(A) K4 is planar while Q3 is not
(B) Both K4 and Q3 are planar
(C) Q3 is planar while K4 is not
(D) Neither K4 nor Q3 are planar


Answer: (B)

Explanation: A Graph is said to be planar if it can be drawn in a plane without any edges crossing each other.

Following are planar embedding of the given two graphs :

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