Hello aspirant
How you are doing well
As per your query you can use blue/black ball point pen to fill the admit card and also make sure not to sign the admit card as it is done in front of the invigilator.
For more details you can ho through the link given below
https://medicine.careers360.com/articles/neet-exam-day-guideline/amp
Beside this limited time is left for neet so you should do revision and sample papers it will help you to boost your confidence and secure good marks.
Below is the link for the sample papers of neet
https://medicine.careers360.com/articles/neet-sample-paper
Good luck
Hope it helps

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