Hii Amrutha ,

Coming to your thumb impression on admit card should be some before entering to the examination hall , it can't be do during examination or in examination hall, the only thing is you need to put signature for attendance that to in presence of invigilator.

Also please use the career 360 link to know about the details and guidelines you have to follow for neet examination

https://medicine.careers360.com/articles/neet-exam-day-guideline

Don't forget to take all the necessary documents need for exam., Please kept it ready a day before examination to avoid last minute rush., You have been waiting for this day since a year.

SO all the best and give best of you in examination.

Hope these will help you.

You will have to sign in the attendance sheet in front of the invigilator and the thumb impression has to be done before you leave for the exam hall along with your Parent's signature on the admit card. Take along with you 2 passport size photographs. Use one for the admit card, one for the self declaration form and another for the attendance sheet. Also take your admit card, Valid Id proof, PWD certificate if applicable. Do not forget masks and gloves, 50 ml sanitiser bottle and a transparent water bottle.