Statements: All aeroplanes are trains. Some trains are chairs. Which of the given conclusions follow?

1.Some aeroplanes are chairs

2.Some chairs are aeroplanes

3.Some chairs are trains

4.Some trains are aeroplanes

ANone follows

BOnly 1 and 2 follow

COnly 2 and 3 follow

DOnly 3 and 4 follow ✓ Correct

Correct answer: (D) Only 3 and 4 follow

Explanation

The pair that follows is "Some chairs are trains" and "Some trains are aeroplanes."

"Some trains are chairs" is a particular affirmative and converts simply.

Its converse, "Some chairs are trains," therefore holds as Statement 3.

"All aeroplanes are trains" converts by limitation to a particular affirmative.

That yields "Some trains are aeroplanes," which is Statement 4.

The premises share only the middle term "trains," so no aeroplane-chair link forms.

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