A C 6 H 14 O chiral alcohol is converted to a bromide by treat with PBr 3 . Reaction of this bromide, first with Mg in ether, followed by quenching in 0.1N HCl produces a chiral hydrocarbon. Which of the following is the original alcohol? A. 2-ethyl-1-butanol B. 3-methyl-3-pentanol C. 4-methyl-1-pentanol D. 3-methyl-1-pentanol