In the Reaction
H-C≡CH(i)NaNH2/liq.NH3(ii)CH3CH2Br×(i)NaNH2/liq·NH3(ii)CH3CH2Br>Y, X and Y are
X=2 -butyne, Y=2 -hexyne
X=1 -butyne, Y=2 -hexyne
X=1 -butyne, Y=3 -hexyne
X=2 -butyne, Y=3 -hexyne