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Gate2017 cs Q13

0. The statement (¬p)⇒(¬q) is logically equivalent to which of the statements below?
I. p⇒q
II. q⇒p
III. (¬q)∨p
IV. (¬p)∨q

  • Option : D
  • Explanation :
    Option D.
    (∼p)⇒(∼q)
    ∼(∼p)∨(∼q)
    p∨(∼q)
    (∼q)∨p ----------------> III is True
    q⇒p -----------------> II is True
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