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In the reaction H- C -= CH overset( (1...

In the reaction
`H- C -= CH overset( (1) NaNH_(2) // liq. NH_(3))underset( (2) CH_(3) CH_(2) Br)(to) X overset( (1) Na NH_(2) // liq. NH_(3))underset((2) CH_(3) CH_(2) Br) (to) Y`
X and Y are -

A

X = 1 - butyne , Y = 3 - hexyne

B

X =2 - butyne , Y = 3 - hexyne

C

X = 2 - butyne , Y = 2-hexyne

D

X = 1 -butyne , Y = 2-hexyne

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