Which Sequence of Reagents Works Best to Convert 3-Hexene to 3-Hexyne

Multiple Choice

Which sequence of reagents works best to convert 3-hexene to 3-hexyne?

A) 1) HCl 2.NaNH₂
B) 1) BH₃∙THF 2.HO^-,H₂O₂ 3.NaNH₂
C) 1) NaNH₂ 2.HI 3.H₃O⁺
D) 1) Br₂,CH₂Cl₂ 2.NaNH₂ (excess)
E) 1) Cl₂,CH₂Cl₂ 2.NaCN (excess)