Choose the appropriate word from the options given below to substitute the given group of words.
Reserved in speech

Correct option is B

The correct one-word for the given group of words is (b) Reticent.
Reticent means someone who is reserved, quiet, or unwilling to speak freely about thoughts or feelings. It describes a person who speaks very little, especially in social situations. (कम बोलने वाला, मितभाषी)
Example:
Although he was highly knowledgeable, he remained reticent during the discussion.
Meanings of the given other options:
· (a) Loquacious: Very talkative. (बहुत अधिक बोलने वाला)
· (c) Resonant: Producing a deep, rich, and clear sound. (गूँजदार)
· (d) Garrulous: Excessively talkative, especially about trivial matters. (बातूनी)