`AC_(6)H_(14)O` chiral alcohol is converted to a bromide by treatment with `PBr_(3)`. Reaction of this bromide, first with Mg in ether , followed by quenching in 0.1NHCl produces an achiral `C_(6)H_(14) ` hydrocarbon. Which of the following is the original alcohol?
A. 2-ethyl-1-butanol
B. 4-methyl-1-pentanol
C. 3-methyl-3-pentanol
D. 3-methyl-1-pentanol