Correct option is A
The correct antonym of the given word is "Success."
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Catastrophe: A sudden, widespread disaster or misfortune. (Hindi: आपदा)
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Example: The earthquake caused a catastrophic loss of life.
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Success: A positive or favorable outcome or achievement. (Hindi: सफलता)
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Example: His hard work led to great success in his career.
Synonyms: Disaster, calamity, tragedy, adversity.
Antonyms: Success, triumph, fortune, prosperity.
Meanings of other options:
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Nurture: To care for and encourage growth. (Hindi: पोषण करना)
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Immaculate: Spotlessly clean or perfect. (Hindi: पूर्णत: स्वच्छ)
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Disaster: A synonym of "catastrophe." (Hindi: विपत्ति)