Correct Answer: C
Explanation:
A.V. – (Sub + V2 + Object)
P.V – (Object + was/were + V3 + by + Sub.)
Note – Certain verbs take Particular Preposition with them for ex. surprised at, engulfed in, decorated with, annoyed with somebody, annoyed at something, contain in Hence, In ‘by + Sub’, ‘by’ is being replaced by these particular prepositions.