Which one of the following statement is correct -

Options

A. bimolecular reactions are always of second order type
B. zero order reaction cannot occur in a single step
C. for the reaction `A+BrarrC` , rate = k [A] [B] and the rate constant of the reaction depends on the initial concentrations of A and B
D. for the reaction `P+QrarrD` , rate `=k[P][Q]^(1//2)` so it is an elementary reaction

Answer

B