Correct option is D
The correct antonym of the given word is (d) Vitality.
Given word (Lethargy): It means lack of energy, sluggishness, or laziness; a state of tiredness and inactivity. (Hindi meaning: सुस्ती, आलस्य, निष्क्रियता)
Example: Lethargy made him unable to concentrate on work.
Correct answer word (Vitality): It means energy, liveliness, and strength; being active and full of life. (Hindi meaning: ऊर्जा, स्फूर्ति, जीवंतता)
Example: The team played with great vitality.
Synonyms (lethargy): laziness, sluggishness, dullness, inactivity.
Antonyms: vitality, energy, liveliness, vigour.
Meanings of all the other given options:
• (a) Fatigue: extreme tiredness (थकान)
• (b) Suspicion: doubt; mistrust (संदेह)
• (c) Lust: strong desire, especially sexual desire (वासना, तीव्र इच्छा)