Hello aspirant
Hope you are doing well
Yes you can staple all the pages if you want but you should carry all the necessary documents with you
Here is the list of documemts or other necessary things you should carry

NEET admit card 2021
Passport size photograph
Postcard size photograph
Valid ID proof - PAN card, Aadhaar card, Voter ID, Driving License, Passport, Ration card
Mask on face
Gloves on hand
Personal transparent water bottle
Personal small hand sanitizer (50 ml)

Aspirants are advised to follow all the rules and regulations of the NEET exam. So that they will not face any kind of problem at the exam centre or inside the exam hall also.
You can visit the given link below for more details
https://medicine.careers360.com/articles/neet-rules-and-regulations
Good luck
Hope it hepls

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