What happens when white phosphorus is heated with concentrated $NaOH$ solution in an inert atmosphere of $CO_{2}$?

• A
  It forms $PH_{3}$ and $NaH_{2}PO_{2}$.
• B
  It forms $P_{2}O_{5}$ and $H_{2}O$.
• C
  It forms $Na_{3}PO_{4}$ and $H_{2}$.
• D
  It forms $PH_{3}$ and $Na_{3}PO_{4}$.