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      Question

      Statements: All books are notebooks.

      Some notebooks are novels. All novels are dairies. All notebooks are letters. Conclusions: I. Some novels are books. II. Some dairies are not notebooks. III. No book is a novel. IV. Some letter are books. In each of the questions below are given four statements followed by four conclusions numbered I, II, 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 Either I or II and III follows Correct Answer Incorrect Answer
      B Either I or III and IV follows Correct Answer Incorrect Answer
      C Only II and III follows Correct Answer Incorrect Answer
      D None follows Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      All books are notebooks (A) + Some notebooks are novels(I) ⇒ No conclusion. Hence, conclusion I and III will not follow. However, Conclusion I and conclusion III make a complementary pair, hence, either conclusion I or III follows. Some notebooks are novels(I) + All novels are dairies(A) ⇒ Some notebooks are dairies (I). Hence, conclusion II will not follow. All books are notebooks (A) + All notebooks are letters.(A) All books are letters (A) ⇒ conversion ⇒ Some letter are books.(I). Hence, conclusion IV will follow.

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