hello Anusankar

hope you fine and great

I would like to tell you that for getting elgible for btech entrances like jeemains, BITS ,ect you should have physics ,chemistry and maths as your main subjects in 12th . since you have passed with pcb and dont have maths then I am very sorry to say you that you are not eligible for btech . if you want to really make carrier in computer science field then you can go through BCA+MCA route ,start preparing for entrance for bca(bacehlors in computer applications)

If you have any other doubt then you can always reach us to clear them :)

we are always available to help you out and guide you

Thankyou