20. Using 30% acetonitrile in hexane as a mobile phase and a Cyano propyl (Si-CH2-CH2-CH2-CN) liquid chromatographic column, the order of elution of the following analytes: (1): p-chloro benzaldehyde, (2): p-chloro benzene and (3): p-chloro phenol is: m (1 Point) (3) followed by (2) followed by (1) (3) followed by (1) followed by (2) (1) followed by (2) followed by (3) (1) followed by (3) followed by (2) (2) followed by (1) followed by (3)