A graph is non-planar if and only if it contains a subgraph homomorphic to
A graph is non-planar if and only if it contains a subgraph homomorphic to
- A.
K3, 2 or K5
- B.
K3, 3 and K6
- C.
K3, 3 or K5
- D.
K2, 3 and K5
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