White phosphorus on reaction with lime water gives calcium

 salt of an acid (A) along with a gas (X). Which of the following is 

correct?

White phosphorous + Lime water  $⟶$

Calcium salt of an acid $\left(\mathrm{A}\right) +\mathrm{Gas} \left(\mathrm{X}\right)$

$2{\mathrm{P}}_4+8\mathrm{Ca}(\mathrm{OH}{)}_2+6{\mathrm{H}}_2\mathrm{O}⟶3\mathrm{Ca}{\left({\mathrm{H}}_2{\mathrm{PO}}_2\right)}_2+2{\mathrm{PH}}_3(\mathrm{X})$

$\left(A\right)$  is ${\mathrm{H}}_3{\mathrm{PO}}_2$ hypophosphorous acid. 

$\left(A\right)$  is monobasic acid. 

  $2{\mathrm{H}}_3{\mathrm{PO}}_2 \stackrel{ \mathrm{\Delta }}{⟶ } {\mathrm{H}}_3{\mathrm{PO}}_4+{\mathrm{PH}}_3$