Ethanol,when reacted with $PCl_5$,gives $A$,$POCl_3$,and $HCl$. $A$ reacts with silver nitrite $(AgNO_2)$ to form $B$ (major product) and $AgCl$. $A$ and $B$ are respectively:

• A
  $C_2H_5Cl$ and $C_2H_5OC_2H_5$
• B
  $C_2H_6$ and $C_2H_5OC_2H_5$
• C
  $C_2H_5Cl$ and $C_2H_5NO_2$
• D
  $C_2H_6$ and $C_2H_5NO_2$