Hello Aspirant,
It seems that you are asking for OMRs that are to be filled by the candidate before start answering, if not then kindly correct me in the comment section given below.
See OMRs are checked through a software and necessary condition for it's checking is that the circles should be completely filled and if some ink gets out of the circle then also it would get considered but the circle should be completely filled because if there will be vacant space in the circles then it would be difficult for software to identify your response.
I hope this information helps you.
Good Luck!!
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