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    Question

    Statement : No paper is a book. All books are

    copies. Some copies are pages. No page is a letter. Conclusion: Some letters are copies. Some books are pages. No copy may be paper. Some letters are not copies. In each of the questions below are given four statements followed by four conclusions numbered I, II and III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of given conclusions logically follows from the given statements disregarding commonly known facts.
    A Only II and IV follows Correct Answer Incorrect Answer
    B Either I or IV and II follows Correct Answer Incorrect Answer
    C Either I or IV and III follows Correct Answer Incorrect Answer
    D Only I, II and IV follows. Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Some copies are pages (I) + No page is a letter (E) ⇒ some copies are not letters (O). Hence, conclusion II and IV will not follow but it will make a complementary pair. All books are copies (A) + Some copies are pages (I) ⇒ No conclusion. Hence, conclusion II will follow. No paper is a book (E). ⇒ All books are copies (A) ⇒ Some copies are not papers (O) ⇒ Probable conclusion ⇒ No copy may be paper (E). Hence, Conclusion III follow.

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