The official CSIR NET Answer Key 2025 was released on 30th December 2025. Candidates who appeared for the December session can now download their response sheets directly from www.csirnet.nta.ac.in or via the direct download link provided below.
The National Testing Agency (NTA) officially released the answer key for the Joint CSIR UGC NET December 2025 Examination on 30th December 2025. Over 212,552 candidates who appeared for the computer-based test (CBT) can now download their CSIR NET Answer Key 2025 using their application number and password. Candidates may submit challenges against the provisional answer key until 01st January 2026 by paying a fee of Rs. 200/- per questioned item.
CSIR NET Answer Key 2025 Out
The Joint CSIR UGC NET December 2025 Examination was conducted nationwide on 18th December 2025 in a computer-based format. The NTA has made both the official answer key and individual candidate response sheets available online. By comparing their marked responses with the official key, candidates can accurately estimate their exam performance based on the prescribed marking scheme.
CSIR NET December Answer Key 2025
The CSIR UGC NET December 2025 Answer Key serves as a vital tool for candidates to review their performance. By accessing the response sheet 2025, students can calculate their probable scores and gauge their standing before the official declaration of results.
| CSIR NET December Answer Key 2025 Highlight | |
| Conducting Body | National Testing Agency (NTA) |
| Exam Name | CSIR UGC NET December 2025 |
| Post Name | Junior Fellowship (JRF), Lectureship/Assistant Professor, and Ph.D. |
| Mode of Answer Key | Online |
| Answer Key Release Date | 30th December 2025 |
| Raise Objections | 30th December 2025 to 1st January 2026 (11 pm) |
| Exam Date | 18th December 2025 |
| Marking Scheme |
|
| Official Website | www.csirnet.nta.ac.in |

The CSIR NET Exam 2025 was conducted by the National Testing Agency (NTA) to assess eligibility for Junior Research Fellowship (JRF), lectureship/Assistant Professor positions, and PhD admissions across recognized universities and colleges in India.
CSIR NET Answer Key 2025 Link
The NTA has officially activated the download portal for the CSIR NET Answer Key 2025 at www.csirnet.nta.ac.in. To simplify the process, we have provided a direct link on this page, allowing candidates to access their results without navigating through the main website portal.
Steps to download the CSIR NET Answer Key 2025
Candidates can conveniently retrieve their answer keys by logging into the official CSIR NET portal at www.csirnet.nta.nic.in and following the step-by-step instructions displayed on the dashboard.
- Visit the official website of the National Testing Agency (NTA) at www.csirnet.nta.nic.in.
- On the homepage, look for the “Latest News” section.
- Candidates find a link to download the “Joint CSIR NET December 2025 – Click Here to Answer Key Challenge.” Click on that link.
- Candidates are redirected to a new page. Here, candidates need to log in by entering their application number and date of birth.
- Enter the Security Pin as shown in the image and click on the Submit tab.
- After successfully logging in, the answer key appears on the screen.
- Download the answer key and calculate your estimated score.
CSIR NET Answer Key December 2025: Raise Objection
The National Testing Agency provides a transparent mechanism for candidates to contest discrepancies in the answer key. Challenges against the CSIR NET December 2025 Answer Key can be submitted from 30th December 2025 to 1st January 2026 upon payment of a non-refundable fee of Rs. 200/- per question. Please note that only online payments via Credit/Debit card or Net Banking are accepted, and all challenges require proof of payment.
Steps to Raise Objections to CSIR NET December Answer Key 2025
- Go to the official website National Testing Agency (NTA) at https://csirnet.nta.ac.in.
- Click on the link that reads “Joint CSIR UGC NET Answer Key Challenge Open Click Here.”
- A new login page appears on the screen. Enter your Application Number and Password, enter your Security PIN as displayed, then click on the submit button.
- Click on “View Question Paper” for marked responses and to view or challenge the Answer keys. Click on the link “Click to view /Challenge Answer Key”.
- You will see Question IDs in sequential order.
- The ID next to the question under the column ‘Correct Option(s)’ stands for the correct Answer Key to be used by NTA.
- If candidates want to challenge this option, they may use any one or more of the Option IDs given in the next four columns by clicking the check box.
- After clicking your desired option, scroll down, ‘Save your Claims’ and move to next screen.
- You will see a display of all the Option IDs you have challenged.
- You may want to upload supporting documents in which you can select ‘Choose File’ and upload (all documents are to be put in a single PDF file only).
- Click on ‘Save your Claims and pay fee’ or in case to modify the claims, click on ‘Modify your Claims’.
- After saving the claims, you will find a screen displaying your challenges.
- Kindly pay the fee by clicking on ‘Pay Fee’. The claims will be saved finally after successful payment of a required fee.
- Select Mode of Payment and Pay a non-refundable processing fee of Rs. 200/- for each question challenged.
UGC NET December Answer Key 2025 Marking Scheme
The CSIR NET exam follows a specific marking architecture: Parts A and B grant 2 marks per correct answer, while Part C awards 4 marks for each correct response. A negative marking policy applies, deducting 25% of the allotted marks for incorrect answers (0.5 marks deduction for Parts A and B, and 1 mark deduction for Part C).
- Correct Answer: (i) Each correct answer in Part A and Part B is awarded 2 marks
(ii) Each correct answer in Part C is awarded 4 Marks - Incorrect Answer: (i) Deduction of 0.5 marks for incorrect answers in Part A and B
(ii) Deduction of 1 mark for incorrect answers in Part C.
| Subjects and Parts | Marks Allotted For Each Question | Negative Marking |
| Chemical Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1 |
| Earth Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1.32 |
| Life Science | ||
| A | + 2 | – 0.5 |
| B | + 2 | – 0.5 |
| C | + 4 | – 1 |
| Mathematical Science | ||
| A | + 2 | – 0.5 |
| B | + 3 | – 0.75 |
| C | + 4.75 | 0 |
| Physical Science | ||
| A | + 2 | – 0.5 |
| B | + 3.5 | – 0.875 |
| C | + 5 | – 1.75 |
Also Read:
- CSIR NET 2026 Exam Date & Official Schedule | NTA Exam Pattern Updates
- CSIR NET December 2025 Application Deadline: Last Chance to Apply Online Today
- CSIR NET Final Result 2026 Released: Direct Link to Download Scorecard & Marks
- CSIR NET Admit Card 2025 Released: Direct Hall Ticket Download Link
- CSIR NPL Technical Assistant Recruitment 2026: Apply for 18 Vacancies
- CSIR CCMB Recruitment 2026: Apply Online for 80 Technician & Technical Assistant Posts