An organic compound 'X' on treatment with pyridinium chloro chromate in dichloromethane gives compound 'y'. Compound 'y', reacts with $l_2$ and alkali to form triiodomethane. The compound 'X' is

Question

$$\begin {array} {1 1} (a)\;C_2H_5O H & \quad (b)\;CH_3 CH0 \\ (c)\;CH_3COCH_3 & \quad (d)\;CH_3 COOH \end {array}$$