There are lot of courses for biology students you just need to decide your interest and aims.
After passing 12th students get confused regarding their career but this is the time to know your interests.There are lot of options for medical courses in India now and have very good scope in India.
No need to confuse so much just try to analyze your aim, once you get to know your interest it will be easy for you to choose course.
To analyze your interest first try to collect all the data in which you are interested.To get admission in any medical course you need to give medical entrance exam which is conducted for 12th appeared and 12th passed students.
You also need to fulfill eligibility criteria for medical entrance exams.
Some best medical courses are here listed choose any course of your interest.
LIST OF MEDICAL ENTRANCE EXAMS
LIST OF MEDICAL COURSES
>You must 12th passed from a recognized board.
>You must also score minimum 50% marks in PCB.