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    Question

    All buildings are mountains. Some jungles may not be

    rivers. Some rivers are mountains. In the given question, a set of conclusions is given. There are five options comprising of three or more statements. You need to choose the option that contains the set of statements from which the given conclusions logically follow.
    A Some jungles are mountains. No building is a river. No river is a jungle. Correct Answer Incorrect Answer
    B No river is a jungle. No jungle is a mountain. Some buildings are rivers. Correct Answer Incorrect Answer
    C All buildings are rivers. All rivers are jungles. All jungles are mountains. Correct Answer Incorrect Answer
    D No building is a river. No river is a jungle. No jungle is a mountain. Correct Answer Incorrect Answer
    E Both 1st and 3rd. Correct Answer Incorrect Answer

    Solution

    All buildings are rivers (A) + All rivers are jungles (A) ⇒ All buildings are jungles (A) + All jungles are mountains (A) ⇒ All buildings are mountains (A) All rivers are jungles (A) ⇒ Conversion ⇒ Some jungles are rivers (I) ⇒ Some jungles may not be rivers (O) All rivers are jungles (A) + All jungles are mountains (A) ⇒ All rivers are mountains (A) ⇒ Some rivers are mountains (I) Hence, option 3  is correct.

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