The homologue of ethyne is :
Be2C + H2O → BeO + x
CaC2 + H2O → Ca(OH)2 + y
Mg2C3 + H2O → Mg(OH)2 + z.
x,y & z are respectively
Which of the following will give addition reactions and why ? C4H10, C2H6, C2H4, CH4, C3H8, C3H4