In the circuit shown in figure points a,...

In the circuit shown in figure points a, b and c are maintained at constant (but may be different) potentials. When a resistance is connected between a and b no current flows through it, when the same resistance is connected between b and c current flows from c to b.

When only three resistance shown in figure are in the circuit

A) current in resistance 2R is from c to d

B) current in 2R is four times the current in R

C) both (a) and (b) are correct

D) both (a) and (b) wrong

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