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    Question

    Choose the synonym of

    Efficacy 
    A Dubious Correct Answer Incorrect Answer
    B Potency Correct Answer Incorrect Answer
    C Tremendous Correct Answer Incorrect Answer
    D Futile Correct Answer Incorrect Answer

    Solution

    ‘Efficacy’ means to be able to produce effective/desired results; hence, potency is the correct answer.  Dubious means to be not sure  Futile means having no result 

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