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    Question

    Statements: No book is a pen. All copies are

    books. All books are telephones. No radio is a telephone. Conclusions: I. Some pens are not copies. II. Some copies are neither books nor telephones. III. Some telephones are neither copies not books IV. Some copies are not radios. 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 I follows Correct Answer Incorrect Answer
    B Only IV follows Correct Answer Incorrect Answer
    C Only I and IV follow Correct Answer Incorrect Answer
    D All follow Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    All copies are books (A) + No book is a pen (E) = No copy is a pen `=>` Conversion`=>` No pen is as copy (E)`=>` I.I`=>` Some pens are not copies(O).Hence, Conclusion I will follow. All copies are books (A)`=>` I.I`=>` Some copies are books(I). All copies are books(A) + All books are telephones(A) = All copies are telephones(A). Hence, neither conclusion II nor III follows. All copies are books (A) + All books are telephones (A)= All copies are telephones (A) + No telephone is a radio (E) = No copy is radio(E)`=>` I.I`=>` Some copies are not radios (O). Hence, conclusion IV will follow.

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