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Question

In each of the questions below are given three statements followed by three conclusions numbered I, II and III.

You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.


Statements
All buildings are rivers.
All rivers are jungles.
All jungles are mountains.

Conclusions
I. Some mountains are rivers.
II. Some jungles are buildings.
III. Some mountains are buildings.

A
Only I and II follow
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B
Only I and III follow
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C
Only II and III follow
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D
All I, II and III follow
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E
None of the above
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Solution

The correct option is D All I, II and III follow
Mediate term of the following statements are
All buildings are rivers (A-type)
All rivers are jungles(A-type)
All buildings are jungles............(i)

Conversion Some jungles are buildings
(Conclusion II follows)
All rivers are jungles
All rivers are mountains

Conversion Some mountains are rivers
(Conclusion I follows)
All buildings are jungle [from Eq. (i)]
All jungles are mountains
All buildings are mountains

Conversion some mountains are buildings
(Conclusion III follows)
or

So all I, II and III follow.

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