GATE Computer Science (CS) 2017 Shift 1 Solved Paper

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Question : 11 of 65
 
Marks: +1, -0
The statement (¬ p) ⇒ (¬ q) is logically equivalent to which of the statements below?
  1. p ⇒ q
  2. q ⇒ p
  3. (¬q) ∨ p
  4. (¬p) ∨ q
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