is class 12 roll number issued by the board or it's Mark sheet is valid ID proof in neet examination centre actually I have colour print out of my updated aadhar card and have nothing else what to do tomorrow is my exam will I be allowed in examination centre

Hi ,for id proof you can carry aadharcard ,driving license ,Voter ID,12th Class Board Admit or Registration card,Passport, Aadhaar Card etc. If you have your aadhar card with your name and other details written correctly then you can definitely use it as your id proof . Remember to wear gloves and masks too as it is compulsory keeping the current pandemic situation in mind. Don't forget to carry other things likeself declaration form download from the website , 50ml sanitizer , self water bottle , photographs same as one uploaded for admit card .
Hope this helps