what reagents, out of those below, would allow the most efficient synthesis of CH3CH2 CH2CH2C equiv CH from CH3(CH2)5 OH? select all that apply. A. HgSO4 B. HBr C. NaH D. BH3 E. Cl2 F. H2SO4 (2 equiv) G. KOC(CH3)3 (2 equiv) in DMSO H. CH3Cl I. H2O2 J. POCl3 in pyridine