hello pooja seervi ,

In maharashtra, you have to attend neet examination and if you score well there,you'll get admission in top college.

Biology  is a compulsory subject for doing B.pharm..

50% marks are required in PCB Group.

Hi there , to get the best pharmacy colleges your rank should be around 1000 or so. Please refer to this answer to get a better idea about scoring to get a rank of 1000.   https://www.quora.com/How-many-marks-should-you-get-to-get-a-rank-below-1000-in-KCET-in-PCM

Please revert if you have any queries. All the best!