Correct option is D
The correct antonym of the given word is (d)
Considerate.
Nonchalant: Calm, relaxed, or indifferent—showing a lack of concern or enthusiasm. (लापरवाह, उदासीन)
Example: He gave a nonchalant shrug and walked away.
Considerate: Thoughtful and caring about others' feelings or circumstances. (विचारशील, संवेदनशील)
Example: She was always considerate towards her colleagues and never raised her voice.
Synonyms: indifferent, unconcerned, casual, detached
Antonyms: attentive, caring, concerned, considerate
Meanings of all the other given options:
·
Unconcerned – Not worried or interested (उदासीन)
·
Boisterous – Noisy, energetic, cheerful (शोरगुल वाला, हंगामेदार)
·
Retrospective – Looking back at the past (पिछले समय को देखने वाला)