Select the most appropriate ANTONYM of the highlighted word in the given sentence.
We had hundreds of courageous scientists.

Correct option is A

The correct antonym of the given word is diffident.
Courageous: A person who is brave, bold, and willing to take risks despite difficulties or fears. (Hindi: साहसी)
Example: The courageous soldier led the troops into battle without hesitation.
Diffident: Lacking self-confidence, hesitant, or shy in expressing opinions. (Hindi: संकोची)
Example: She was too diffident to share her ideas during the meeting.
Synonyms: brave, fearless, daring, bold.
Antonyms: shy, hesitant, timid, diffident.
Meanings of all the other given options:
· Gutsy: Brave and determined, showing courage in difficult situations. (Hindi: हिम्मती)
· Audacious: Bold, daring, and willing to take risks. (Hindi: दुस्साहसी)
· Valiant: Possessing or showing courage and determination. (Hindi: वीर)