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. `6250 S m^(2) mol^(-1)`
B. `6.25 xx 10^(-4) S m^(2) mol^(-1)`
C. `625 xx 10^(-4) S m^(2) mol^(-1)`
D. `62.5 S m^(2) mol^(-1)`