Statements: 1. All aeroplanes are trains. 2. Some trains are chairs. Conclusions: I. Some aeroplanes are chairs. II. Some chairs are aeroplanes. III. Some chairs are trains. IV. Some trains are aeroplanes.

Only Conclusions I and II follow
Only Conclusions II and III follow
Only Conclusions III and IV follow
None follows

Correct Answer: Only Conclusions III and IV follow

Explanation:

First Premise is Universal Affirmative (A – type).
Second Premise is Particular Affirmative (I – type).
All Aeroplanes are trains. ↔ Some trains are chairs.
A + I ⇒ No Conclusion
Conclusion III is the Converse of the second Premise.
Conclusion IV is the Converse of the first Premise.

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