Who gave you ice-cream?
A
Who has given you ice-cream?
B
By whom were you given ice-cream?
C
By whom was you given ice-cream?
D
Who had given you ice-cream?
Correct Answer: By whom were you given ice-cream?
By whom were you given ice-cream?In such case who will change into by whom.
Rule :
By whom + subject + (was /were) + V3 + other agents.
