Identify the part of speech of the highlighted word in the sentence given below.
Man is a unique animal.

Correct option is A

The correct answer is (a) Noun.
• The word “Man” names human beings (a class/category of living beings).
• A naming word for a person/animal/thing/idea is called a noun.
• Here, “Man” is not replacing any noun (so it is not a pronoun), and it is not describing another noun (so it is not an adjective).
Example: Man is a social animal.
Other options are incorrect because:
• (b) Pronoun: a word used in place of a noun (he, she, they, etc.)
• (c) Adjective: a word that describes a noun (unique is the adjective here)
• (d) Adverb: a word that modifies a verb/adjective/adverb