An organic compound (A) having molecular formula `C_6H_6O` gives a characteristic colour with aqueous `FeCI_3` solution. (A) on treatment with `CO_2` and NaOH at 400 K under pressure gives (B), which on acidification gives a compound (C). The compound (C) reacts with acetyl chloride to give (D) which is a popular pain killer.
Compound (A) on heating with compound (C) in presence of `POCl_3` gives a compound (D) which is used

Options

A. in perfumery as a flavouring agent
B. as an antipyretic
C. as an analgesic
D. as an intestinal antiseptic.

Answer

C