Darzen's procedure is the best method for preparing alkyl halide because

Options

A. The reaction goes to completion
B. The reagent thionyl chloride is cheap
C. Both the byproducts are gaseous and escape easily leaving behind pure alkyl halide
D. The reaction of alcohol with `PCl_3` is reversible

Answer

C

Explanation

Darzens process is the best because both the products of the reaction `(SO_2` and HCl) are gases and can easily escape leaving behind pure alkyl halide