Hi,

There is no as such provision to choose subjects particularly in your graduation after completing class 12 in PCB. You have the choice to choose among the offered courses under this stream and study for those subjects particularly. If any elective is provided, you can choose that subject in the particular course.

Various courses offered under PCB Stream includes:

• B.SC in various specializations(Chemistry, Physics, Biology, Botany, Zoology, Psychology, Microbiology, etc.)
• MBBS
• BDS
• BAMS
• BHMS
• B.Pharma
• B.SC Nursing and more

You can choose any of the course offered the PCB stream. To get the whole list  of courses along with top colleges, scope, refer to the following link: https://medicine.careers360.com/articles/medical-courses-after-12th