Which of the following gives propyne on hydrolysis?

Magnesium carbide (${\text{Mg}}_2{\text{C}}_3$) contains the propynide ion (${\text{C}}_3^{4-}$) which upon hydrolysis yields propyne.
$${\text{Mg}}_2{\text{C}}_3+4{\text{H}}_2\text{O}\to {\text{CH}}_3-\text{C}\equiv \text{CH}+2\text{Mg}(\text{OH}{)}_2$$
Note: ${\text{Al}}_4{\text{C}}_3$ gives methane, and ${\text{CaC}}_2$ (not listed) gives acetylene.