The rate law of nitration of benzene using a mixture of nitric acid and sulphuric acid is
A. rate `=k ["benzene"] [NO_(2)^(+)] [H^(+)]`
B. rate `= k [HNO_(3)] [H_(2)SO_(4)]`
C. rate `= k ["benzene"] [NO_(2)^(+)]`
D. rate `= k ["benzene"] [H_(2)SO_(4)]`