Correct option is A
The correct synonym of the given word is (a)
harmful.
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Pernicious: This word means having a harmful effect, especially in a gradual or subtle way.
Hindi meaning: हानिकारक
Example: "The pernicious weed spread quickly and choked out the native plants."
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Synonym:
Harmful: meaning causing or capable of causing harm; damaging.
Hindi Meaning: हानिकारक
Example: "Smoking is harmful to your health."
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Synonyms: damaging, destructive, detrimental, injurious.
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Antonyms: beneficial, helpful, wholesome, good.
Meanings of all options:
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Harmful: causing or likely to cause harm.
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Innocuous: not harmful or offensive.
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Positive: consisting in or characterized by the presence rather than the absence of distinguishing features.
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Tricky: requiring skill or caution to deal with.