Resistance of `0.2 M` solution of an electrolyte is `50 Omega`. The specific conductance of the solution is ` 1.3 S m^(-1)`. If resistance of the `0.4 M` solution of the same electrolyte is `260 Omega`, its molar conductivity is .
A. `5 xx 10^(3)`
B. `5 xx 10^(2)`
C. `5 xx 10^(-4)`
D. `5 xx 10^(-3)`