Which of the following is not logically equivalent to the proposition : “A real number is either rational or irrational”.

  • A

    If a number is neither rational nor irrational then it is not real

  • B

    If a number is not a rational or not an irrational, then it is not real

  • C

    If a number is not real, then it is neither rational nor irrational

  • D

    If a number is real, then it is rational or irrational

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