If G is a connected planar graph of v vertices e edges and r regions then

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📊 Theory of Computation

Q. If G is a connected planar graph of v vertices e edges and r regions then

(A) v-e+r=2
(B) e-v+r=2
(C) v+e-r=2
(D) None of above.

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✅ Correct Answer: (A) v-e+r=2

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