Education and Career Forum

Can i appear in both science as well as commerce exam in class 12th

No. those are two different streams.

Its similar to become a doctor and an engineer at the same time.
Or we can say, Sachin Tendulkar playing cricket and singing songs at the same time!

You need to understand what you need to become to become in your life. Your desire, interest and area of strength.

You can choose PCM or Commerce, but that should be your own choice, never try to get influence by the sheep trend to follow the other students without knowing what you really want.
In these also, there are subdivisions-
Science
PCM + computers/physical education
PCM + Biology
PCB + Mathematics

Commerce
Commerce +Maths
Commerce without maths

So, decide wisely and follow your mind and the inner feeling which will definitely guide you to the right path.