What subjects do i need to take to become a doctor particularly a pediatrician or pathologist?

There is a similar topic here, though a lot of the advice is about college subjects: https://careervillage.org/questions/2211/what-classes-should-you-take-generally-to-get-ready-for-med-school

In high school, make sure you take science and math courses, like algebra, biology, and chemistry. Check with colleges and/or your state to determine what other classes are required in high school to graduate, but you also likely need to take a few years of English and history along with your high-level math and science courses to show your readiness for college.