`C_6H_5NH_2underset(0-^@)overset((NaNO_2)/(HCl))toXunderset(CH_2)overset(HNO_2)toY+N_2+HCl`
X and Y are respectively
A. `C_6H_5-N=N-C_6H_5,C_6H_5N_2^(o+)Cl^(Theta)`
B. `C_6H_6N_2^(o+)Cl^(Theta),C_6H_5-N=N-C_6H_5`
C. `C_6H_5N_2^(o+)Cl^(Theta),C_6H_5NO_2`
D. `C_6H_5NO_2,C_6H_6`
