Statements: Some file are copy. Some copy are eraser. No [eraser]... Conclusions: I, II, III. Which follows?

Only I follows
Only II follows
Either I or III follows
None follows

Correct answer: Either I or III follows

Solution

After drawing Venn diagrams for the given statements (Some file=copy, Some copy=eraser, No...), conclusions I and III are found to be complementary, hence 'Either I or III follows'.

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