`KCI + "conc" H_(2)SO_(4) + K_(2)Cr_(2)O_(7) overset(Delta) to (X) overset(NaOH) to (Y),(X) ` is reddish brown coloured gas soluble in `NaOH` forming `(Y),(X) and (Y) `are
A. `Cr_(2)OCI_(2)Na_(2)CrO_(3)`
B. `Cr_(2)O_(2)CI_(2)Na_(2)CrO_(3)`
C. `CrO_(2)CI_(2)Na_(2)CrO_(6)`
D. `CrO_(2)CI_(2)Na_(2)CrO_(4)`