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
