Select the correct passive form of the given sentence.
His mother laughed at his mistake.

Correct option is A

Active voice: The subject of the sentence does the action (e.g., The chef cooked the meal).
Passive voice: The subject of the sentence receives the action (e.g., The meal was cooked by the chef).
The correct passive voice form is (a) His mistake was laughed at by his mother.
Explanation:
This sentence involves a transitive phrasal verb – "laugh at".
When converting to passive voice, the object “his mistake” becomes the subject.
Rules for passive transformation:
· Identify object → make it the subject
· Use proper helping verb (in this case, “was” for past simple)
· Add “been” if perfect tense
· Keep the preposition with the verb ( “laughed at” remains together)
Active:
Subject + V2 (laughed) + preposition + object
= His mother laughed at his mistake.
Passive:
Object + was/were + V3 + preposition + by + subject
= His mistake was laughed at by his mother.
Incorrect Options Explanation:
· (b) Missing auxiliary verb
· (c) Wrong tense (present instead of past)
· (d) Missing preposition “at”