A Circuit Consists of 2N Resistors,all of Resistance R,connected as Shown

Multiple Choice

A circuit consists of 2N resistors,all of resistance R,connected as shown below.A potential difference V is applied to one end,and the other end is at ground potential.The equivalent resistance of the circuit is

A) $\frac { R } { 2 }$ .
B) R.
C) $\frac { N R } { 2 }$ .
D) NR.
E) 2NR.