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Class 14
REASONING
Statements: All A are B. No B is C. ...

Statements: All A are B. No B is C. All C are D.
Conclusions: I. Some C are A. II. Some D are C. III. Some D are not B.

A

(a) Only conclusion II follows.

B

(b) Only conclusion I follows.

C

(c) Only conclusions II and III follow.

D

(d) Only conclusions I and III follow.

Text Solution

Verified by Experts

The correct Answer is:
A

Conclusion I : Some unemployed are teachers.
This can not be true as all teachers are researchers and no researcher is unemployed. So no teacher can be unemployed.
Conclusion 2 : No teacher is unemployed .
This statement is true and can clearly be seen from the Venn diagram.
Conclusion 3 :some teachers are unemployed.
This statement can not be true as it.s contradictory to conclusion 2.
From the venn diagram it is clear that all teachers are researchers and hence neither a teacher nor a researcher can be unemployed.
Therefore, only conclusion 2 follows.
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