AP physics question

Physics C only requires Calculus to be taken at the same time, not in advance.

Physics 1 as a Junior and Calculus plus Physics C as a Senior is fine.

I would avoid a Summer course in a course as fundamental as Calculus, unless you know it’s a rigorous, complete course from a competent instructor. Summer courses are often rushed and incomplete, and that could greatly impact you in the future.

(Fwiw, Purdue PHYS172 Modern Mechanics (Engineering Freshman Physics) only has a Calc I co-requisite.)