In the following questions, the sentences have been given in Active / Passive Voice. From the given alternatives, choose the one which best expresses the given sentence in Passive / Active Voice.

He was obliged to resign.

A. He was made to resign

B. To resign was his obligation

C. Circumstances obliged him to resign

D. Resignation obliged him

Please do not use chat terms. Example: avoid using "grt" instead of "great".