A. Manhattan HS for girls or Prospect
B. Depends on what kind of guy you’re looking for in a few years, which is highly influenced by your HS
C. Bais Yaakov of Boro Park, where there is more fun and less academics than most schools.
I assume you’re not looking for a chassidish one, in which case A. is popularly considered Bais Bracha, B is B or Tomer Devora, and C is BYBP or Vien.
I also assume you live in Brooklyn