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Statements: Some books are calendars. No calendar is a paper. All papers are pencils. All pencils are pens. Conclusions: (I.) All pen being pencil is a possibility. (II.) Some calendar being pencil is a possibility. (III.) No pencil is a calendar. (IV.) All pencils being paper is a possibility.
A possible Venn-diagram is: Another possible Venn-diagram is: Or From the above Venn-diagrams I, II and IV conclusion follows. So answer is 4).
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