If 4 equations are required to describe a circuit by Mesh-Current method and there are n nodes. How many branches are there in the network?

(a) n+5

(b) n+3

(c) n

(d) n-1

I have been asked this question in class test.

The query is from The Mesh-Current Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits

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