It ought to be her with whom you share your secrets, not me.

A. her with whom you share your secrets, not me
B. her with whom you share your secrets, not I.
C. she with whom you share your secrets, not me.
D. she with whom you share your secrets, not I.
E. her with who you share your secrets, not me.

OA is A

The PRonoun usage here is conflicting can an Expert give a technical approach to solve this pls?Thanks