Which AP subject exams would you recommend for a student intending to take Science major in Undergrad or hopefully go for a 7 year BS-MD program
Which grade are you in now ?
It really depends on your school curriculum and AP classes.
It is highly recommended to take all 4 Sci/Math classes in HS, AP/IB/Hons - AP Calc, Bio, Chem, and Physics (AP/Hons).
Many BSMD programs ask for SAT Subject Test in Chemistry as well.
Agree with the above and also take the math 2 subject test for sure. I think bio would be more beneficial than the chem subject test but thats up to you (or you could take both). Also, take courses you are interested in, are there any AP electives that appeal to you (psych, comp sci, econ etc)?