Correct Answer - c
When `2-` butyne is heated with `NaNH_(2)` in an inert solvent, the sodium derivative of but`-1-`yne which is converted into but `-1-`yne by the action of dil. `HCl`.
`CH_(3)-C-=C-CH_(3)+NaNH_(2)overset(Parafi n e)rarr NH_(3)+CH_(3)CH_(2)C-=CNa overset(dil. HCl)rarr underset(1-butyn e)(CH_(3)CH_(2)C-=CH`