Topic: Adverb (ক্রিয়াবিশেষণ),

Best Answer Explained in Below-:

In the sentence "He was wise enough to accept the offer," the word "enough" functions as an adverb. This is because it modifies the adjective "wise," indicating the degree to which he was wise. Adverbs often modify verbs, adjectives, or other adverbs, and in this case, "enough" specifies the level of wisdom possessed by the subject.

To break it down further, "wise" describes a quality or state of being, and by adding "enough," we are not just describing the quality but also qualifying it; specifically, it indicates that he possesses a sufficient amount of wisdom to make the decision to accept the offer. The structure "adjective + enough" is a common grammatical construction where "enough" enhances the meaning of the preceding adjective.

In contrast, the other options don't fit: "Adjective" would imply "enough" is describing a noun, "Preposition" would indicate a relationship with a noun or pronoun, and "Conjunction" would connect clauses or phrases, none of which align with the role "enough" plays in this specific context. Therefore, the correct answer is indeed C) Adverb.