GATE | Sudo GATE 2020 Mock III (24 January 2019) | Question 11

Let p and q denote the statement “The message is scanned for viruses”, and “The message was sent from an unknown system” respectively. Then the statement “When a message is not sent from an unknown system it is not scanned for viruses.” is represented by:
(A) q → p
(B) p → q
(C) p’ → q’
(D) q’ → p’

Answer: (D)

Explanation: Option (D) is correct.

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