Under the same conditions, initial concentration of 1.386 mol `dm^-3` of a substance becomes half in 40 seconds and 20 seconds through first order and zero order kinetics respectively. Ratio `(k_1/k_0)` of the rate constants for first order `(k_1)` and zero order `(k_0)` of the reaction is

Options

A. `0.5 mol^-1 dm^3`
B. `1.0 mol^-1 dm^3`
C. `1.5 mol dm^3`
D. `2.0 mol^-1 dm^3`