Passive voice of "Who taught you English"?

A. By whom was English taught to you?
B. Who was taught English to you?
C. Who was teaches you English?
D. By whom is English is taught to you?

Explanation

The object “English” becomes the passive subject, while the question word “who” changes to the agent phrase “by whom.” The past-tense passive is “was English taught to you?”

Passive voice of "Who taught you English"?

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