Question

    Three statements are given followed by three

    conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All oranges are apples. All apples are grapes. Some grapes are pears. Conclusions: I. Some oranges are pears. II. Some grapes are apples. III. Some apples are oranges.
    A Only conclusions I and III follow Correct Answer Incorrect Answer
    B Only conclusions II and III follow Correct Answer Incorrect Answer
    C Only conclusions I and II follow Correct Answer Incorrect Answer
    D All conclusions follow Correct Answer Incorrect Answer

    Solution

    All oranges are apples (A) + All apples are grapes (A) → All oranges are grapes (A) + Some grapes are pears (I) → No conclusion. Hence conclusion I does not follow. All apples are grapes (A) → Conversion → Some grapes are apples (I). Hence conclusion II follows. All oranges are apples (A) → Conversion → Some apples are oranges (I). Hence conclusion III follows.

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