The correct passive form of 'Who baked the cake?' is -

A Who the cake was baked?

B By whom has the cake been baked?

C By who was the cake baked ?

D By whom was the cake baked ?

Correct Answer: Option D

Who দিয়ে active sentence আরম্ভ হলে passive এর পরিবর্তে by whom হয় ।এর পরের অংশটুকু passive এর স্বাভাবিক নিয়মানুযায়ী সম্পাদিত হয় ।