STD 11 - 5. Thermodynamics and thermochemistry — NEET STD 11 Science — Question

$Cl_2(aq)+H_2SO_4(aq) \rightarrow S(s)+2H^+(aq)+2Cl^-$

The rate equation for this reaction is

rate $=k[Cl_2][H_2S]$

Which of these mechanisms is/are consistent with this rate equation ?

$A.\,\, Cl_2 + H_2S \rightarrow H^+ + Cl^- + Cl^+ + HS^-\,\, (slow)$

        $Cl^+ +HS^- \rightarrow H^+ +Cl^- +S \,(fast)$

$B.\,\, H_2S \rightleftharpoons  H^+ + HS^-\,$ (fast equilibrium)

       $Cl_2^+ + HS^- \rightarrow  2CI^- + H^+ + S\,\, (Slow)$