Correct option is B
The correct antonym of the given word is (b)
Meaningful.
Irrelevant: Something that is not connected or related to the matter at hand. (Hindi: असंबंधित, अप्रासंगिक)
Example: His comments were irrelevant to the discussion.
Meaningful: Something that has importance, significance, or relevance. (Hindi: सार्थक, महत्वपूर्ण)
Example: The teacher gave a meaningful explanation that helped students understand the topic.
Synonyms: Unrelated, Extraneous, Immaterial, Off-topic
Antonyms: Relevant, Meaningful, Appropriate, Pertinent
Meanings of all the other given options:
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(a) Reluctant: Unwilling or hesitant (अनिच्छुक)
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(c) Meagre: Lacking in quantity or quality (अल्प, कम)
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(d) Incidental: Occurring by chance, minor (आकस्मिक या गौण)