ISRO ICRB UDC Answer Key 2026: Check Answer Key & Objection Window

Answer Key Details

Objection / Challenge Process

• Step 1: Visit the official ISRO website
• Step 2: Log in using your Mobile Number and Password.
• Step 3: Open the Answer Key Objection portal.
• Step 4: Select the question you wish to challenge.
• Step 5: Upload valid documentary proof supporting your claim.
• Step 6: Pay the objection fee of ₹100 per question through online mode.
• Step 7: Submit the objection form.
• Step 8: Download the acknowledgement receipt for future reference.

Important Official Links

How to Download the Response Sheet

1. Open the official answer key link from the table above.
2. Log in with your application number and password or date of birth.
3. Select your exam session and open the response sheet / answer key tab.
4. Compare your responses with the official answer key to estimate your score.
5. If the objection window is open, raise challenges for any question you believe is wrong.
6. Download the PDF and keep a printout for future reference.

Frequently Asked Questions

Q. Can I challenge the answer key?

Yes – most examination authorities open a limited objection window after the provisional key is released. Challenges submitted within the window (with the required fee, where applicable) are reviewed before the final key is published.

Q. Is there a fee to raise an objection?

Some examinations charge a small fee per challenged question; check the official notification for the exact amount and the refund rule.

Q. How is the final answer decided?

After the objection window closes, the authority reviews the valid challenges and publishes the final answer key. The result is prepared on the basis of the final key.

Q. Where can I apply / download the official documents?

All official links (Apply Online, Official Notification, Official Website) are given in the Important Official Links table above.

Q. Is the information on this page official?

This page is an information summary. Every date, fee and figure shown here is taken from the official notification or the official website linked above. Candidates should always verify the details from the official notification before applying.