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    Question

    In the question below some statements are given followed by three conclusions I, II and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusion definitely follows from the given statements, disregarding commonly known facts.

    Statements:

    Some Dogs are Rats.

    No Dog is Cat.

    All Cats are Tigers.

    Conclusions:

    I. Some Rats are not Tigers.

    II. Some Cats are Dogs.

    III. Some Cats are not Rats.

    A Only Conclusion I follows Correct Answer Incorrect Answer
    B Only Conclusion I and II follow Correct Answer Incorrect Answer
    C None of the above conclusions follows Correct Answer Incorrect Answer
    D Only Conclusion III follows Correct Answer Incorrect Answer

    Solution

    No Dog is Cat (E) + All Cats are Tigers (A) → Some Tigers are not Dogs (O*) + Some Dogs are Rats (I) → No conclusion. Hence conclusion I does not follow. No Dog is Cat (E) → Conversion → Some Cats are not Dogs (O). Hence conclusion II does not follow. Some Dogs are Rats (I) → Conversion → Some Rats are Dogs (I) + No Dog is Cat (E) → Some Rats are not Cat (O). Hence conclusion III does not follow.

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