Identify the most appropriate ANTONYM of the word in brackets.
The teacher commended the student for his (diligent) efforts.

Correct option is D

The correct antonym of "diligent" is "lazy".
Diligent: Hardworking, attentive, and careful in one's work. (परिश्रमी, मेहनती)
· Example: The diligent student studies for hours without distraction.
Lazy: Unwilling to work or make an effort. (आलसी)
· Example: A lazy person avoids tasks and responsibilities.
Synonyms of "diligent": Hardworking, conscientious, industrious, meticulous.
Antonyms of "diligent": Lazy, careless, sluggish, indifferent.
Meanings of other given options and why they are incorrect:
· Hardworking – Synonym of diligent (परिश्रमी)
· Conscientious – Synonym of diligent (ईमानदारी से काम करने वाला)
· Industrious – Synonym of diligent (मेहनती)