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    Question

    Statements:  Some documents are files. All

    books are folders. No file is a folder. Conclusions:       I. No folder is a file. II. All folders are documents. III. No book is a file.   In each question three statements followed by three conclusions numbered I, II and III have been given. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. 
    A Only I follows Correct Answer Incorrect Answer
    B Only I and II follow Correct Answer Incorrect Answer
    C Only I and III follow Correct Answer Incorrect Answer
    D All I, II and III follow Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    No file is a folder (E) ⇒ conversion⇒ No folder is a file (E). Hence conclusion I follows.  Some documents are files (I) + No file is a folder (E) ⇒  Some documents are not folders(O). Hence conclusion II does not follow.  All books are folders (A) + [No file is a folder (E)] ⇒ conversion⇒ No folder is a file (E) ⇒  No book is a file (E). Hence conclusion III follows.

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