hi,
I assume you are asking about jee main exam, yes you need to career a passport size photo which is same as in admit card. along with admit card you need to carry a passport size photo and any government id proof like PAN card, Driving License, Voter ID, Passport, Aadhaar card with photograph, E-Aadhar, etc.
now a days its really easy to get photo, if you have any scanned copy of photo or a hard copy of photo you can take it to the cyber cafe and instantly get hard copy of photo.
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