What are the reagents needed for conversion of benzene to phenyl acetylene?
i.CH3COCl/AlCl3 ii.Zn−Hg,HCl/Δ iii.NBS,KOH,Br2/CCl4
i.CH3COCl ii.KMnO4/H+
i.CH3COCl ii.K2Cr2O7/H+ iii.Zn/Hg,HCl
i.CH3COCl/AlCl3 ii.Zn−Hg,HCl/Δ,iii.NBS/Light iv.NaNH2(2equiv.)