Correct option is C
The correct passive voice of the given sentence is
"A lecture on personality development will be given by him."
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Rule for conversion from active to passive voice:
· Identify the subject, verb, and object in the active sentence.
· Rearrange the sentence such that the object of the active voice becomes the subject of the passive voice.
· Use the appropriate form of the verb "to be" + past participle of the main verb.
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Structure:
· Active: Subject + will + verb (base form) + object
· Passive: Object + will + be + past participle + by + subject
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Example:
· Active: She will complete the project.
· Passive: The project will be completed by her.