Correct option is A
The correct synonym of the given word is (a)
Ample.
Abundant: Existing or available in large quantities. (बहुतायत में, प्रचुर मात्रा में)
Example: The country has abundant natural resources.
Ample: Sufficient or more than enough. (पर्याप्त मात्रा में)
Example: There was ample food for everyone at the party.
Synonyms: Plentiful, bountiful, overflowing, ample
Antonyms: Scarce, insufficient, meager, limited
Meanings of all the other given options:
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(b) Cyclonic – Related to a cyclone or storm (चक्रीय तूफानी)
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(c) Intermittent – Occurring at irregular intervals; not steady (रुक-रुक कर होने वाला)
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(d) Prolonged – Extended for a long time (लंबे समय तक चलने वाला)