11th Class Mental Ability Syllogisms Question Bank Question - Syllogism

  • question_answer
    Direction: Each of the following questions contains two statements followed by two conclusions numbered I and II. You have to consider the two statements to be true, even if they seen to be at variance at the commonly known facts. You have to decide which of the given conclusions definitely follows from the given statements.
    You are to give your answer as: (a) if only I follows ; (b) if only conclusion II follows ; (c) if either I or II follows; (d) if neither I nor II follows and (e) if both I and II follow.
    Statement:  
    A. Some streets are roads.
    B. Some roads are lanes.
    C. Some lanes are highways.
    Conclusions:
    I. Some roads are not streets.
    II. No highways are streets.
    III. Some streets are not roads.
    IV. Some lanes are not roads.

    A) Only III follows

    B) Only III and IV follow

    C) Either I or III follows

    D) Both I and III follow

    E) None of these

    Correct Answer: E

    Solution :

    Explanation Option (e) is correct. No conclusion is derived from the given statements because I + I type pair has no solution. No conclusion can be arrived as the immediate inference of the statements. There is no complementary pair. So none follows.


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