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  1. I. All chickens are birds.
    II. Some chickens are hens.
    III. Male birds do not lay eggs.

    If all the above statements are true, which of the following statements must be true?

    1. Hens are birds.
    2. All birds lay eggs.
    3. Some chickens are not hens.

    2. A.
    1 and 2 only
    B.
    2 and 3 only
    C.
    3 only
    D.
    1 and 3 only

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    Answer : Option D

    Explanation :

    The second statement is not true as only female birds lay eggs. The first statement is true as hens are chickens and all chickens are birds. The third statement is also true as some chickens are hens, then some must not be hens.

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