What if someone wrote an enrollment?
I havent given any RTU exam but i have done graduation from UPTU and have given many competitive exams so according to my experience i guess. Almost every answer sheet and at every admit card there is an instruction written about not to write anything which reveals your personal identity except on the front page(where you have to fill in the information) So, Its not advisable to write enrollment number or contact number because these will lead to USE OF UNFAIR MEANS or in short UFM.