Hi,

After 12th with science there are number of choices available for a person. One can do

1. Graduation courses in science subjects
2. Diploma courses
3. Certificate courses

You can do graduation, diploma and certificate courses in

Medical stream

Biomedical stream

Basic science

Engineering

Computers and IT

Education stream.

Depending upon your main subjects of study and your interest you can choose relevant course for yourself.

Hope this helps.