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      Question

      In the question below some statements are given

      followed by three conclusions 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 the given conclusion definitely follows from the given statements, disregarding commonly known facts. Statements: Some Jet are Helicopter. No Helicopter is Airplane. Some Airplane are Pilot. Conclusions: I. Some Jet are not Pilot. II. Some Pilot are not Helicopter. III. No Jet is Airplane.
      A Only conclusion II follows Correct Answer Incorrect Answer
      B Only conclusions I and II follow Correct Answer Incorrect Answer
      C All the conclusions follow Correct Answer Incorrect Answer
      D Only conclusions I and III follow Correct Answer Incorrect Answer

      Solution

      Some Jet are Helicopter (I) + No Helicopter is Airplane (E) → Some Jet are not Airplane (O) + Some Airplane are Pilot. (I) → No conclusion. Hence neither conclusion I nor III follow.
      No Helicopter is Airplane (E) + Some Airplane are Pilot (I) → Some Pilot are not Helicopter (O*). Hence conclusion II follows.

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