A) Cat. Hydrogenation
B) \[{{H}_{2}}/\]Lindlar Cat.
C) \[Li/N{{H}_{3}}\]
D) \[LiAl{{H}_{4}}\]
Correct Answer: C
Solution :
[c] With Lithium in liquid ammonia, trans-alkene is almost an exclusive product. \[Ph-C\equiv C-Ph\xrightarrow[Birch\,\,reduction]{Li\,\,in\,\,liq.N{{H}_{3}}}\]
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