$P_4O_{10}$ cannot be used to dry $NH_3$ because ..............

• A
  $P_4O_{10}$ reacts with moist $NH_3$
• B
  $P_4O_{10}$ is not a dehydrating agent
• C
  $P_4O_{10}$ is acidic while $NH_3$ is basic
• D
  $P_4O_{10}$ is basic while $NH_3$ is acidic