Correct option is B
The correct passive voice of the given sentence is (b).
Explain the rules of conversion from active to passive voice:
Structure:
Active voice: Subject + will + base verb + object
Passive voice: Object + will + be + past participle + by + subject
Here, “She” is the subject, “will present” is the verb, and “the paper” is the object.
So in passive, the object "the paper" becomes the subject. The correct passive structure becomes:
The paper + will be + presented + by her.
Example:
Active: He will finish the work tomorrow.
Passive: The work will be finished by him tomorrow.
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Info Booster: Modal verbs like will, can, may, etc. are followed by “be + past participle” in passive voice.