The reagent needed for converting

The reagent needed for converting

1. Cat. Hydrogenation
2. $\mathrm{H}_2$ /Lindlar Cat.
3. $\mathrm{Li} / \mathrm{NH}_3$
4. $\mathrm{LiAlH}_4$

Solution

With Lithium in liquid ammonia, trans-alkene is almost an exclusive product.

Asked in: JEE Main 2014 (11 Apr Online)

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