The following mechanism has been propsoed for the reaction of NO with `Br_(2)` to form NOBr.
`NO(g) +Br_(2)(g) hArr NOBr_(2)(g),`
`NOBr_(2)(g) +NO(g) rarr 2NOBr(g)" "` (slow step)
If the second step is the rate determining step, the order of the reaction with respect to NO(g) is:
A. 1
B. 0
C. 3
D. 2
