Choose the word opposite in meaning to the one given above.
VIGILANT

Correct option is A

The correct antonym of the given word is (a) Careless.
Given word (Vigilant): It means alert, watchful, and careful to notice danger or problems. (Hindi meaning: सतर्क, चौकस)
Example: The vigilant guard noticed the intruder.
Correct answer word (Careless): It means not paying enough attention; negligent or inattentive. (Hindi meaning: लापरवाह, असावधान)
Example: Careless driving can cause accidents.
Synonyms (vigilant): alert, watchful, attentive, cautious.
Antonyms: careless, negligent, inattentive, heedless.
Meanings of all the other given options:
• (b) Slow: not fast; taking more time (धीमा)
• (c) Useless: not useful; of no value (बेकार)
• (d) Valuable: having great worth (कीमती, मूल्यवान)