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Nomenclature of Unsaturated Hydrocarbons

In each of th...

Question

In each of the following questions two statements followed by four conclusions numbered I, II, III and IV are given, You have to take the two given statements to take 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 statements.

Statements
Some houses are offices.
Some offices are schools.

Conclusions
I. Some schools are houses.
II. Some offices are houses.
III. No house is school.
IV. Some schools are offices.

A

Both II and III follow

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B

Both I and IV follow

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C

Only either III or IV and I follow

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D

II and IV and either I or III follow

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E

None of the above

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Solution

The correct option is D II and IV and either I or III follow
Some offices are schools
Conversion
Some schools are offices
(Conclusion IV follows)
Some houses are offices
Conversion
Some offices are houses
(Conclusion II follows)
Conclusion I or III are complementary pairs

Either I or III follows and II and IV follow.

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