Hello aspirant
Hope you are doing well
You can print your admit card in A4 size paper there will be less space for your photograph but there will be no issue with that you can use additional space to stick your photograph .
You have to carry  certain things with admit card
Passport size photograph
Valid id proof
Proforma of admit card
Duly filled self declaration/ undertaking
https://news.careers360.com/neet-2021-dont-forget-carry-these-documents-exam-centre
For further details you can go through link above
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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