# An organic compound A having molecular formula $C_6H_6O$ gives a characteristic colour with aqueous $FeCl_3$ . When A is treated with $NaOH$ and $CO_2$ at $400\;K$ under pressure, compound B is obtained. Compound B on acidification gives compound C which reacts with acetyl chloride to form D which is a popular pain killer. Deduce the structure of A, B, C and D. What is the common name of Drug D?
$\begin{array}{1 1} \text{(a) A - Methanol , B - Sodium Salicylate , C-Salicylic Acid , D - Aspirin} \\ \text{ (b) A - Phenol , B - Sodium Salicylate , C-Salicylic Acid , D - Aspirin} \\ \text{(c) A - Phenol , B - Sodium Salicylate , C- Propanoic Acid Acid , D - Aspirin} \\\text{(d) A - Phenol , B - Sodium Salicylate , C-Salicylic Acid , D - Ethyl acetate}\end{array}$