Chemistry · PYQ NEET UG 2016(1)

In the reaction, \( \mathrm{H-C \equiv C-H} \xrightarrow[ii. \mathrm{CH}_{3}\mathrm{CH}_{2}\mathrm{Br}]{i. \mathrm{NaNH}_{2} / \text{liq. } \mathrm{NH}_{3}} \mathrm{X} \xrightarrow[ii. \mathrm{CH}_{3}\mathrm{CH}_{2}\mathrm{Br}]{i. \mathrm{NaNH}_{2} / \text{liq. } \mathrm{NH}_{3}} \mathrm{Y} \) X and Y are

1. A
   \( \mathrm{X = But-1-yne ; Y = Hex-3-yne} \)
2. B
   \( \mathrm{X = But-1-yne ; Y = Hex-2-yne} \)
3. C
   \( \mathrm{X = But-2-yne ; Y = Hex-2-yne} \)
4. D
   \( \mathrm{X = But-2-yne ; Y = Hex-3-yne} \)