Correct Answer:
B. Adjective
In the sentence, "Tom demanded thorough enquiry," the word "thorough" describes the type or quality of the "enquiry." An adjective is a word that modifies or describes a noun or pronoun. Here, "enquiry" is a noun, and "thorough" tells us more about it, indicating that the enquiry should be complete and detailed.
- A: Noun is incorrect because a noun names a person, place, thing, or idea, which "thorough" does not do in this context.
- C: Adverb is incorrect because an adverb modifies a verb, an adjective, or another adverb, typically answering how, when, where, or to what extent. "Thorough" is not modifying a verb here.
- D: None of these is incorrect as "Adjective" is the correct classification.