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    Question

    Statements: Some drives are laptops.

    All laptops are keyboards. No keyboard is a computer. Conclusions: I. Some drives are not keyboards. II. Some laptops are computers. III. No drive is a computer. IV. Some computers are not drives. In each question given below some statements are followed by conclusions some. You have to take the given statements to be true even if they seem to be at variance with the commonly known facts. Read all the conclusions and then decide which of the given conclusions definitely logically follow from the give statements, disregarding commonly known facts.
    A Only I, II and IV follow Correct Answer Incorrect Answer
    B Only IV follows Correct Answer Incorrect Answer
    C All follow Correct Answer Incorrect Answer
    D None follows Correct Answer Incorrect Answer

    Solution

    Some drives are laptops (I) + All laptops are keyboards (A) ⇒ Some drives are keyboards (I). Hence, conclusion I will not follow. All laptops are keyboards (A) + No keyboard is a computer (E) ⇒ No laptop is a computer (E). Hence, conclusion II will not follow. Some drives are laptops (I) + All laptops are keyboards (A) ⇒ Some drives are keyboards (I) + No keyboard is a computer (E) ⇒ Some drives are not computers (O). Hence, conclusion III & IV will not follow.

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