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(1) Some buildings are not skyscrapers.  (2) Some skyscrapers are not buildings. (3) No structure is a skyscraper. - Logical Reasoning

MCQ

The question contains six statements followed by four sets of combinations of three. Choose the set in which the combinations are logically related. 

(1) Some buildings are not skyscrapers. 
(2) Some skyscrapers are not buildings.
(3) No structure is a skyscraper.
(4) All skyscrapers are structures.
(5) Some skyscrapers are buildings.
(6) Some structures are not buildings.

Options

  • (1), (3), (5)

  • (2), (4), (6)

  • (6), (4), (1)

  • (1), (3), (5)

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Solution

(1), (3), (5)

Explanation:

According to the given information, the Venn diagram is as follows:

So, only 1, 3 and 5 are logically related.

Concept: Syllogism
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