Correct option is C
Active Voice- It denotes that the noun or pronoun that acts as the subject in the sentence is the doer of the action. In other words, the subject performs the action or acts upon the verb.
Passive Voice- represents that the subject is one acted upon by the action or verb in the sentence. It can also be said that the passive voice indicates that the subject in the sentence is no longer active but passive.
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While changing active voice into passive voice following rules are followed:
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Structure Change: In the passive voice, the object "a fire" becomes the subject of the sentence, and "can you light" is transformed into "can be lit."
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Modal Verb: The modal verb "can" is retained in the passive voice, followed by "be" and the past participle "lit."
Thus, the correct passive voice for the sentence "How can you light a fire if you have no matches?" is (c) "How can a fire be lit if you have no matches?"
Example:
· Active: "How can you solve the problem?"
· Passive: "How can the problem be solved?"