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    Question

    Statements: Only dogs are cats. No rat is

    a dog. Mostly camels are rats. No camel is a cow Conclusions: I. No cat is rat. II. A few camels are dogs. III. Mostly rats are not cows. In the question below there are four statements followed by three conclusions I, II and III. You have to take the four given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the four statements disregarding commonly known facts.
    A Only conclusion III follows Correct Answer Incorrect Answer
    B All the conclusions follow Correct Answer Incorrect Answer
    C Only I and III follow Correct Answer Incorrect Answer
    D Only conclusion II and III follows Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Only dogs are cats → All cats are dogs (A) and cats cannot have positive relation with anyone. Hence conclusion I follows as it represents negative relation. Mostly camels are rats (A) + No rat is a dog (E) → No camel is a dog (E). Hence conclusion II does not follow. No camel is a cow (E) → Conversion → No cow is a camel (E) + Mostly camels are rats (A) → Some rats are cows (O*). Hence conclusion III does not follow.

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