What will happen if a student write roll number in OMR sheet but?
I made the same mistake but believe me it is okay! It is quite normal for students to make little fumbles in exam information due to nervousness and the board understands this. If you have written the roll number on the OMR sheet , it would suffice the need and your paper would be easily located. But I would recommend you to carefully fill the exam information so as to not give yourself any worries during the examination. Don't worry now and don't repeat the mistakes. Shift your focus now to the rest of the papers. Thanks for the A2A Arnab!