Which of the following is used for the conversion of 2-hexyne into trans-2-hexene?

Question

$\begin{array}{1 1}(a)\;H_2/Pd/BaSO_4\\(b)\; H_2,PtO_2\\(c)\;NaBH_4\\(d)\;Li-NH_3/C_2H_5OH\end{array}$