The Reagent Needed to Convert 2-Butyne to Cis-2-Butene Is ________ $\mathrm { H } _ { 2 } , \mathrm { Pd } / \mathrm { C }$

The reagent needed to convert 2-butyne to cis-2-butene is ________.

A) $\mathrm { H } _ { 2 } , \mathrm { Pd } / \mathrm { C }$
B) $\mathrm { H } _ { 2 } / \text { Lindlar cataly }$
C) $\mathrm { Li } / \mathrm { NH } _ { 3 }$
D) $\mathrm { Na } / \mathrm { NH } _ { 3 }$
E) $\mathrm { H } ^ { + } / \mathrm { H } _ { 2 }$