$\mathrm{K_2Cr_2O_7}$ is heated with KCl in presence of $\mathrm{H_2SO_4}$. Find the correct match of product with their oxidation state.
(A) $\mathrm{CrO_2Cl_2}$, +6
(B) $\mathrm{Cr_2O_2Cl_2}$, +6
(C) $\mathrm{Cr_2O_2Cl}$, +5
(D) $\mathrm{CrO_2Cl_2}$, +5