Reagent that converts an alkyne to a cis-alkene

1. A.
   ZnCl2/HCl
2. B.
   Pd-C quinoline
3. C.
   Na/liquid NH3
4. D.
   Na/Hg in H2O

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1. A.
   ${ZnCl}_{2}/HCl$
2. B.
   Pd-C/quinoline
3. C.
   $Na/$ liquid ${NH}_{3}$
4. D.
   $Na/Hg$ in $H_{2}O$

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