Following is the graph between `(a-x)^(-1)` and time `t` for second order reaction `theta=tan^(-1)(0.5)OA=2L mol^(-)`
Hence, the rate at the start of the reaction is
A. `1.25 L"mol"^(-1) "min"^(-1)`
B. `0.5 "mol"^(-1)L "min"^(-1)`
C. `0.125 "mol"^(-1)L "min"^(-1)`
D. `1.25 "mol"^(-1)L "min"^(-1)`