How many of the following reactions would produce phosphine gas?

(a) ${\mathrm{PH}}_4\mathrm{Cl}+\mathrm{NaOH}⟶$  (b) ${\mathrm{P}}_4+\mathrm{NaOH}\stackrel{\mathrm{\Delta }}{⟶}$

(c) ${\mathrm{Ca}}_3{\mathrm{P}}_2+{\mathrm{H}}_2\mathrm{O}⟶$      (d) ${\mathrm{H}}_3{\mathrm{PO}}_3\stackrel{\mathrm{\Delta }}{⟶}$

(e) ${\mathrm{PCl}}_5+{\mathrm{H}}_2{\mathrm{SO}}_4⟶$     (f) ${\mathrm{H}}_3{\mathrm{PO}}_2\stackrel{\mathrm{\Delta }}{⟶}$

(g) ${\mathrm{P}}_2{\mathrm{Cl}}_4+{\mathrm{H}}_2\mathrm{O}⟶$       (h) $\mathrm{AlP}+{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{\Delta }}{⟶}$

 (i)  ${\mathrm{P}}_4{\mathrm{O}}_{10}+{\mathrm{H}}_2\mathrm{O}⟶$

If your answer is 3, write the answer as 003.