Which of the following would be produced when acetylene reacts with $HCl$?

$A$ mixture of methane,ethylene,and acetylene gases is passed through a Wolf's bottle containing ammoniacal cuprous chloride. The gas coming out is

Assertion : Acetylene on reacting with sodamide gives sodium acetylide and ammonia.
Reason : $sp$ hybridised carbon atoms of acetylene are considerably electronegative.

Calcium carbide $+ D_2 O \longrightarrow \underline{X} + Ca(OD)_2$.
The hybridisation of carbon atom$(s)$ in $X$ is:

The major product in the following reaction is $H_3C-C\equiv CH + HBr$ (excess)

The catalyst used in the dimerization of acetylene to prepare chloroprene is: