Just go through the last 30 years papers....to get an idea...that what type of questions had been asked..and on that basis cover the topic which is left...
First of all instead of wasting time on all of this just concentrate on your study and obviously it would be fruitful to u and concentrate on your concepts practice more and more questions and all the very very best
jxt see lectrs of dr. gitendra on youtube who is giving free daily lctrs on u his channel Biomentors online . his misiion is to score 360/360. he teaches very good n cvrs all the imp points .
I think you first prepare some reading lesson of both subject like phy and chemistry ......and for bio you prepare ncert.......this is my suggestion.... how you about this?... tell me