c
Electron with drawing group stabilises the benzene ring due to delocalisation of charge. \(-CH_3\) and \(-CH_2OH\) are electron donating group and hence decrease the stability of benzene ring \(-OCH_3\) is weaker electron with drawing group than \(-COCH_3\) . Hence \(-COCH_3\) group more stabilize the phenoxide ion at \(p-\) position.