In a metre bridge experiment null point is obtained at $$20$$ cm from one end of the wire when resistance $$X$$ is balanced against another resistance $$Y$$. If $$X < Y$$, then where will be the new position of the null point from the same end, if one decides to balance a resistance of $$4X$$ against $$Y$$?

A

$$50$$ cm

B

$$80$$ cm

C

$$40$$ cm

D

$$70$$ cm