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    Question

    Statements : Some files are folders.

    Some folders are envelopes. Some envelopes are letters. Conclusions: I. Some letters are folders. II. Some files are envelopes. III. Some envelopes are folders. In each of the questions below are given three statements followed by three conclusions numbered I, II and III. 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 None follows Correct Answer Incorrect Answer
    B Only I and II follow Correct Answer Incorrect Answer
    C Only III follow Correct Answer Incorrect Answer
    D Only I and III follow Correct Answer Incorrect Answer
    E All follow Correct Answer Incorrect Answer

    Solution

    Some folders are envelopes(I) + Some envelopes are letters(I) ⇒ No conclusion. Hence conclusion I does not follow. Some files are folders(I) + Some folders are envelopes(I) ⇒ No conclusion. Hence conclusion II does not follow. Some folders are envelopes(I) ⇒ Conversion ⇒ Some envelopes are folders (I). Hence conclusion III follows. ALTERNATE METHOD:

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