The correct answer is C. 32145.
The first word, “is”, is a verb. The second word, “smoking”, is a participle. The third word, “he”, is a pronoun. The fourth word, “given”, is a verb. The fifth word, “to”, is a preposition.
The participle “smoking” modifies the pronoun “he”. The verb “given” is in the passive voice. The preposition “to” indicates that the pronoun “he” is the recipient of the action.
The sentence can be paraphrased as “He is given to smoking.” This means that he is often seen smoking.
The other options are incorrect because they do not make sense in the context of the sentence. Option A, 31452, is the reverse of the correct answer. Option B, 35421, is not a grammatically correct sentence. Option D, 32541, is a grammatically correct sentence, but it does not make sense in the context of the question.