A potentiometer wire, which is 4 m long is connected to the terminals of a battery of steady voltage. A leclanche cell gives a null point at 1m if the length of the potentiometer wire be increased by 1 m, What is the new position of the null point ?
(A) 1.25 m
(B) 1.4 m
(C) 1.75 m
(D) 1.2 m