In the reactions `HC-=CHoverset((1)NaNH_(2) // liq. NH_(3))underset((2)CH_(3)CH_(2)Br)rarrX`
`X overset((1)NaNH_(2) //liq. NH_(3))underset((2)CH_(3)CH_(2)Br)rarrY,X` and `Y` are `:`
A. X= 2-butyne, Y=2-hexyne
B. X=2-butyne, Y=3-hexyne
C. X=1-butyne, Y=2-hexyne
D. X=1-butyne, Y=3-hexyne