If you don't have your response key, download from NTA JEE WEBSITE
INSTRUCTION
1. Login to your JEE MAINS DASHBOARD on NTA JEE WEBSITE
2. After login, you will get the option to view your response key.
3. When the response key is loaded in the browser, press "Ctrl+s" to save the file as ".html" format.
4. Upload the saved file above (by clicking the "Browse..." button).