Hello student.

Hope you are doing well.

I am assuming that you are in class 9 or 10 as you have not specified that. So basically for being a doctor subjects which are important for you are Physics, Chemistry and Biology.

You do not need maths for that just a basic understanding for solving numericals is required which you'll gain till your 10th standard.

Keep your full focus mainly on Physics, chemistry and biology. You can choose maths as additional but it might cause harm to your percentage as it will require a lot of practice in itself.

As per my opinion choose some other additional subject and study with utmost focus with PCB subjects and have a good command on maths till class 10.

Hope this will help you, have a great day!!

Good luck!!