When white phosphorous reacts with `NaOH`, it produces a gaseous mixture by the following parallel reaction.
`P_(4) +3NaOH +3H_(2)O rarr 3NaH_(2)PO_(2)+PH_(3)uarr`
`3P_(4)+8NaOH +8H_(2)O rarr 8NaH_(2)PO_(2)+2P_(2)H_(4)uarr`
The correct thermal stability order is
A. The lone pair of P is present at 3d orbital
B. the lone pair of P raised at almost pure p orbital
C. the lone pairs of p raised at `sp^(3)` hybrid orbital
D. the lone pair of p raised at almost pure s orbital
