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for an undirected graph with n vertices and e edges, the sum of the degree of each vertex is equal to

Q.

For an undirected graph with n vertices and e edges, the sum of the degree of each vertex is equal to

[A] 2n

[B] 2e

[C] (e²+1)/2

[D] (2n-1)/2

Answer & Explanation
Option: [B]

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