Correct option is B
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Correct answer:
(b) Effect
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Explanation:
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"Effect" refers to
the result or impact of an action.
· The sentence describes
how drugs produce a "euphoric effect" (a feeling of extreme happiness or altered state of mind).
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Meanings of other options:
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Cause – The reason something happens (incorrect, as the sentence refers to the result, not the reason).
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Affect – A verb meaning "to influence" (incorrect, as we need a noun).
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Result – The outcome (similar but not commonly used in this phrase).