Hi aspirant,

I am sorry to inform you that if you change your stream after reaching your 12th standard, you will have to start your schooling again from 11th in science board. both 11th and 12th standard subjects and concepts form a base in your career irrespective of the stream you choose in. If you really wish to study in science stream withdraw from your school and reapply for 11 th standard in science stream.

Hope this helps

ALl the best