Hello, 

As per your requirement, i would say that you can't get sample obc certificate for admission into aiims and jipmer.

You need to have a valid certificate if you want to avail the reservation of seats of obc category. If you cant provide actual documents then you wil be rejected during counseling.

Getting a seat in government medical college is depending on many factors like studenrs to seat ratio, cut off, reservation, ranking of college, etc

Cut off varies evert year as per your reservation category and no. Of students applying for the same. 

Or else, you can get admission with low cut off through management quota also.

Good luck