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.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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