To claim an Exemption

Friends,

I have a doubt regarding exemptions in ca.

I am in final giving my group2 exams.

Say i have prepared for one subject out of four.

Say i have prepared only for IDT.

One of the conditions to claim the exemption is that you must appear for all the exams. But is it also necessary to score a few marks in all the other papers?

Thanking you

Reply will be deely appreciated