Correct option is A
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Meaning of the given word:
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Peripheral – Not of primary importance; on the edge or boundary (परिधीय, गौण).
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Synonyms:
· Inessential, Secondary, Marginal.
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Antonyms:
· Central, Important, Crucial.
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Meanings of the options:
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Inessential – Not essential or important (गौण) (Correct Answer).
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Middle – The central part of something (मध्य).
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Important – Of great significance (महत्वपूर्ण).
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Circumference – The boundary of a circle (परिधि).