1) Tellegen's theorem (as applicable to any lumped d.c. network, regardless of the elements being linear or non-linear, time-varying or time-invariant) implies that

A) sum of the voltage drops across each network element is equal to the total voltage applied to the network

B) sum of the powers taken by all elements, in the network, within the constraints imposed by KCL and KVL is zero

C) sum of the currents meeting at any node is not the same as the current in that mesh

D) it is applicable to a branch which is not coupled to other branches of the network