Apply for verification or not?

I am the student of ca final and have passed my 2nd group in the recent declared results.

Although i passed in this group but in one subject i did not get as much marks as was expected by me.I don't want the inspection of certified copies as this process doesn't result in increase of marks.

In this regard,my query is as under:

'If i apply for verification of marks for that one subject,can my marks even then decrease and if so then it may also happen that by such reduction of marks i even loose in aggregate and consequently fail in that group'.

So Please reply whether this would happen or not or what else? and hence should i apply for verification or not.