Consider the following reaction ,
`{:(I. RCOOH +PCl_(5) to R COOCl+ POCl_(3)+CHl),(II. 3RCOOH+PCl_(5) to 3R COCl+H_(3)PO_(3)),(III. RCOOH+SOCl_(2) to RCOCl+SO_(2)+HCl):}`
Which of the abvoe reaction (s) is/are preferred for the synthesis of RCOCl ?

Options

A. Only I
B. Only II
C. Only III
D. All of the above

Answer

C