In the sentence “She gave him a thoughtful reply”, the word “thoughtful” functions as a/an

Correct option is A

The correct option is (a).

• Explanation: In the phrase “a thoughtful reply”, the word “thoughtful” describes the noun “reply”.
• A word that qualifies or describes a noun is called an adjective.
• Therefore, “thoughtful” functions as an adjective in the sentence.

Grammar Rule involved (English/ Hindi):
• An adjective describes the quality, nature, or state of a noun or pronoun.
• जो शब्द noun या pronoun की विशेषता बताता है, उसे adjective कहते हैं।
• यहाँ “thoughtful” noun “reply” की quality बता रहा है।

Meanings of other options:
• Preposition – A word showing relation with a noun or pronoun (संबंधसूचक अव्यय)
• Pronoun – A word used in place of a noun (सर्वनाम)
• Adverb – A word that modifies a verb, adjective, or another adverb (क्रिया विशेषण)

So the correct answer is (a)