Correct option is A
Active Voice: The subject performs the action expressed by the verb.
Passive Voice: The subject receives the action expressed by the verb.
The correct passive voice is (a)
Madhu will be sent away to a boarding school by them.
Explanation:
Structure:
· Active: Subject + will + V1 + object
· Passive: Object + will be + V3 + by + subject
Example:
· Active: They will complete the task.
· Passive: The task will be completed by them.
Other options:
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(b) – “will send” requires passive form “will be sent”.
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(c) – “shall” is outdated for third person.
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(d) – future perfect passive, changes the original tense.