If you're from biology background then you can go for medical. You can get admission into government medical institutes by scoring good marks in the exams like NEET and AIMS, if you failed to score high you would get private colleges who's fees are higher than government ones. Else if you do not want to go into medical line you can simply do BSc from any subject you wish and later on do masters in the subject.
Hope it helps.
Thank you.

Hey Vaishnavi

There are a plenty of options that you have after class 12th of you've completed it in Medical stream.  Here are a few courses that you go for-

MBBS

BDS BAMS

BHMS

BUMS

BVSC

Nursing

Physiotherapy 

Radiology

  Bsc in various streams like Chemistry, Physics, Biology, Zoology, Forestry etc

Paramedical Courses

Other than this you  can also change your stream if you wish like and go for BBA, BCOM, BA, Hotel management, Law, Management, Design courses.

Best of luck