GATE | GATE-CS-2014-(Set-2) | Question 65

A cycle on n vertices is isomorphic to its complement. The value of n is _____.
(A) 2
(B) 4
(C) 6
(D) 5

Answer: (D)

Explanation: Below is a cyclic graph with 5 vertices and its complement graph.


The complement graph is also isomorphic (same number of vertices connected in same way) to given graph.

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