MCQ
The reagent needed for converting
$Ph - C \equiv C - Ph \to $ 
- ACat. Hydrogenation
- B$H_2/$ Lindlar Cat.
- ✓$Li/NH_3$
- D$LiAlH_4$
$Ph - C \equiv C - Ph \to $
$Ph-C\equiv C-Ph\xrightarrow[Brich\,reduction]{Li\,in\,liq.N{{H}_{3}}}\begin{matrix}
^{Ph} \\
_{H} \\
\end{matrix}\begin{matrix}
\text{ }\!\!\backslash\!\!\text{ } \\
/ \\
\end{matrix}C=C\begin{matrix}
/ \\
\text{ }\!\!\backslash\!\!\text{ } \\
\end{matrix}_{Ph}^{H}$
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$NO_2^ + \to N{O_2} \to NO_2^ - $
$(a)\,\,B\,\,\,\,\,\,\,\,\,\,(b)\,\,Mg\,\,\,\,\,\,\,\,\,\,\,\,(c)\,\,Li\,\,\,\,\,\,\,\,\,\,\,\,(d)\,\,Al\,\,\,\,\,\,\,\,\,\,\,(e)\,\,K$
$C{H_3} - C{H_2} - CH = C{H_2}\xrightarrow[{{H_2}{O_2}}]{{HBr}}$