Saturated hydrocarbon gas is evolved by which carbide(s)?

CHEMISTRY · Multi correct

Problem

Saturated hydrocarbon gas is evolved by which carbide(s)? (1)

\text{CaC}_2

(2)

\text{Al}_4\text{C}_3

(3)

\text{Mg}_2\text{C}_3

(4)

\text{Be}_2\text{C}