In the reaction H-C CH ->[(1)NaNH2 / liq.NH3][(2)CH3CH2Br] X ->[(1)NaNH2 / liq.NH3][(2)CH3CH2Br] Y X and Y are :

1. A. X = 1-Butyne ; Y = 3-Hexyne
2. B. X = 2-Butyne ; Y = 3-Hexyne
3. C. X = 2-Butyne ; Y = 2-Hexyne
4. D. X = 1-Butyne ; Y = 2-Hexyne

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