I am also appearing n so i vl tel u wht i m doing... fr history i m skipping sec 3 completely n doing the other two perfectly. for geo, u need 2 stress on topic agriculture n industies as thre often 1 or 2 question from these. u may do any 9-10 topics frm huma sethi book. they r more thn enough 2 answer 3 ques. use revision chklist along with geo syllabus. it vl help u 2 decide wht u need 2 skip n wht u need 2 know.