‘\( x \)’ is the product which is obtained by the hydrolysis of prop-\( 1 \)-yne in the presence of mercuric sulphate under dilute acidic medium at \( 333 \, \text{K} \). ‘\( y \)’ is the product which is obtained by the reaction is ethane nitrile with methyl magnesium bromide in dry ether followed by hydrolysis. IUPAC name of product obtained from ‘\( x \)’ and ‘\( y \)’ in the presence of barium hydroxide followed by heating is:
