Hello aspirant.

You can download sample OMR sheet from here:

http://www.omrsheet.com/upload-new/180-QUESTION/180%20Q%20omr.pdf

As every OMR sheet are almost same including NEET ,you have to properly circle your answer, Roll no, Name etc. The circling should be done by ball point pen. As the OMR sheets are checked by computer.

Hope this will help you.