When planning the preparation of a particular target compound, a chemist often must select from among alternative routes. Suppose, for example, that one wished to prepare 4-ethyl-2-phenyl-2hexanol.

A. If Bromobenzene is used as one of the starting compound, what other compound would be required in the preparation of this compound by a Grignard Synthesis?
B. Show how the same alcohol could be prepared using a different bromo compound and a different carbonyl compound from those used in 1a.