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      Question

      Read the given statements and conclusions carefully.

      You have to take the three given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows from the three statements disregarding commonly known facts. Statements: All Twilight are Star. All Asteroid are Comet. No Asteroid is Twilight. Conclusion: I. Some Star are not Asteroid. II. Some Comet are not Twilight. III. All Twilight are Comet.
      A Only conclusions I and II follow Correct Answer Incorrect Answer
      B Only conclusions I and III follow Correct Answer Incorrect Answer
      C All the conclusions follow Correct Answer Incorrect Answer
      D Only conclusion II and III follow Correct Answer Incorrect Answer

      Solution

      No Asteroid is Twilight (E) + All Twilight are Star (A) тЖТ Some Star are not Asteroid (O*). Hence conclusion I follows. All Asteroid are Comet (E) тЖТ Conversion тЖТ Some comet are Asteroid (I) + No Asteroid is Twilight (E) тЖТ Some comet are not Twilight (O). Hence conclusion II follows but conclusion III does not follow.

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