Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
Statements:
All calsses are tools.
Some tools are nails.
No nail is a class.
Conclusions:
(I) Some classes are nails.
(II) All tools are classes.
(III) Some nails are tools.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Only conclusion III follows.

Conclusions:
(I) Some classes are nails - Does not follow (because there is no direct relation between classes and nails so it can be possible but not definite)
(II) All tools are classes - Does not follow (because All classes are tools. So, All tools cannot be classes)
(III) Some nails are tools - Follows (because Some tools are nails. So, Some nails are tools too)