Correct Answer:
Option B - The correct structured sentence is -
‘‘By whom was this done?’’
When the same interrogative is placed after a verb or preposition, it becomes ‘whom’.
Hence, option (b) is correct.
B. The correct structured sentence is -
‘‘By whom was this done?’’
When the same interrogative is placed after a verb or preposition, it becomes ‘whom’.
Hence, option (b) is correct.