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    Question

    In each group of questions below are two conclusions

    followed by five set of statements. You have to choose the correct set of statements that logically satisfies given conclusions. Given statements to be true even if they seem to be at variance from commonly known facts. Conclusions: Some Layers are not Crusts. No Mantle is a Layer. Statements:
    A All Mantles are Parts. No Part is a Layer. Some Layers are Crusts. Correct Answer Incorrect Answer
    B All Mantles are Parts. Only a few Parts are Layers. Only a few Layers are Crusts. Correct Answer Incorrect Answer
    C All Mantles are Parts. Some Parts are Layers. Only a few Layers are Crusts. Correct Answer Incorrect Answer
    D All Mantles are Parts. Some Parts are not Layers. Only a few Layers are Crusts. Correct Answer Incorrect Answer
    E All Mantles are Parts. No Part is a Layer. Only a few Layers are Crusts. Correct Answer Incorrect Answer

    Solution

    Only a few Layers are Crusts → Some Layers are Crusts (I) and Some Layers are not Crusts (O).   All Mantles are Parts (A) + No Part is a Layer (E) → No Mantle is a Layer (E).

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