Suman said to Poonam, "whom were you speaking to over the phone?"

A

Suman asked Poonam whom she had been speaking to over the phone.

B

Suman asked Poonam whom she has been speaking to over the phone.

C

Suman asked Poonam that who was over the phone.

D

Poonam asked Suman that who was talking to her over the phone.