The preferred reagent for the preparation of pure alkyl chloride from alcohol is

• A

  $\mathrm{HCl}+\mathrm{ZnCl}_2$
• B

  $\mathrm{PCl}_5$
• Correct answer
  C

  $\mathrm{SOCl}_2$
• D

  $\mathrm{PCl}_3$

Hence, the correct answer is option: 'C'.