Select the most appropriate ANTONYM of the given word.
Vigorous

Correct option is B

The correct antonym of the given word is (b) delicate.
Vigorous: Strong, healthy, and full of energy; forceful. (शक्तिशाली, ऊर्जावान)
Example: She made a vigorous effort to finish the project before the deadline.
Delicate: Fragile, weak or easily broken; lacking strength. (नाजुक, कमजोर)
Example: The plant is too delicate to survive the harsh weather.
Synonyms: energetic, strong, robust, dynamic
Antonyms: weak, delicate, frail, sluggish
Meanings of all the other given options:
· (a) Extreme: Very great in degree or intensity. (अत्यधिक)
· (c) Energetic: Full of energy. (ऊर्जावान)
· (d) Hard: Solid and firm. (कठिन/मज़बूत)