Assertion (A) : The molecularity of the reaction
`H_(2) + Br_(2) rarr 2HBr` is `2`.
Reason (R ): The order of the reaction is `3//2`.
A. If both (A) and (R) are correct but (R) is the correct explanation of (A) .
B. If both (A) and (R) are correct but (R) is not the correct exaplanation of (A)
C. If (A) is correct but (R) is incorrect
D. If (A) is incorrect but (R) is correct