Skip one group

No effect.

my advice is appear for both,try to attempt as much as possible.

But i havnt studied a work for the 2nd group. That would be just to go and sit thr for 3 hrs for no use

you might have not studied but u have one leave between each exams and just go and have fun in exams 

Just appearing for 3 papers is no ham as u will not appear u will remain absent i.e u will b failing in second grp 

and by goin for exams there is some chance to at least pass in one papper 

I am also suggesting the same focus on Grp1 bbut as u have registered for Grp 2 just go and sit in the exam hall for Grp two papers as there is no harm...

I did the same thing for my IPCC attempt and i also sat for all 3 hours as there was nothing to loose i knew i was not prepared but as much i studied in one night i tried to utlizedd it fully 

@ Ashish : Focus on group1 only...Not attempting for Grp 2  will not affect your result.

@ Innocent amy : Rank is given only if you have attempted both the groups.