An organic compound X on treatment with pyridinium chloro chromate in dichloromethane gives compound Y. Compound Y reacts with I2 and alkali to form triiodomethane. The compound ‘X’ is

From the given information, X reacts with pyridiniumchloro chromate in dichloromethane to form Y. PCC is a weak oxidizing agent and it is used to oxidize alcohol to aldehyde. So from the given options only 퐶2퐻5푂퐻 is alcohol and when it is treated with PCC ethanal is formed which on reaction with iodine gives triiodomethane.