Correct option is A
The correct answer is
(a) Noun.
• The word “prodigy” names a person who has exceptional talent at a young age.
• Naming words for persons, places, animals, things, or ideas are called nouns.
• Here, “prodigy” is the complement that names what the child is, so it functions as a noun.
Example: The boy is a prodigy in mathematics.
Why other options are incorrect:
• Verb shows an action, but “prodigy” is not an action word.
• Pronoun replaces a noun (he, she, it), but “prodigy” is not replacing anything.
• Adverb modifies a verb/adjective/adverb, but “prodigy” does not modify anything.