For most of the colleges you aren't eligible as you are less than 18 and for most of the exams like NEET you need to be atleast 18 years.

Some of the most appreciated courses after 12th PCB are:

• MBBS
• BHMS
• BAMS
• BDS

• BSC in Botany/Zoology/Chemistry/Nutrition and Dietetics/Biochemistry

• B. Pharmacy

• BPT

• BUMS

• MICROBIOLOGY

• BIOTECHNOLOGY

• BIOINFORMATICS

• FORENSIC SCIENCE

• GENETICS/GENETICAL ENGINEERING

• NURSING

• BA in Mass Com. and Journalism/Psychology/Sociology/Foreign languages/English Hons./Law/Hotel Management/Designing Courses

As you have passed 10+2 at a very early age, you can be called a prodigy. So in India there are organizations like NIAS EGT for prodigies but they don't really have any such bachelors courses.

To know more about NIAS visit the link below:

http://prodigy.net.in/nias-alc

I would recommend you to contact your school teachers about this they can give you some recommendations to colleges. Also if you have very good results then you can approach the colleges in order to avail you special permission to take admission. This can be a bit challenging but you have to manage it.

I hope my answer helps. All the very best for your future endeavors!