Which compound is produced when 2-phenylpropan-1-ol is heated under reflux with an excess of acidified potassium dichromate(VI)?
C6H5CH(CH3)CHO\text{C}_6\text{H}_5\text{CH}(\text{CH}_3)\text{CHO}C6H5CH(CH3)CHO
C6H5CH(CH3)COOH\text{C}_6\text{H}_5\text{CH}(\text{CH}_3)\text{COOH}C6H5CH(CH3)COOH
C6H5COCH2CH3\text{C}_6\text{H}_5\text{COCH}_2\text{CH}_3C6H5COCH2CH3
C6H5CH2COCH3\text{C}_6\text{H}_5\text{CH}_2\text{COCH}_3C6H5CH2COCH3