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Statements: All aeroplanes are trains. Some trains are chairs. Conclusions: Some aeroplanes are chairs. Some chairs are aeroplanes. Some chairs are trains. Some trains are aeroplanes.

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

Correct Answer: Only III and IV follow

Explanation:

Since the middle term 'trains' is not distributed even once in the/premises, no definite conclusion follows. However, III is the converse of the second premise while IV is the converse of the first premise. So, both of them hold.

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