The number of independent loops for a network with n nodes

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The number of independent loops for a network with n nodes and b branch is—

1. n – 1
2. b – n
3. b – n + 1
4. Independent of the number of nodes

Correct Option: C

We know that loop = b – n + 1
where b = no. of branch,
n = no. of nodes
so alternative (C) is correct.