This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
[{'content': 'Conversion of phenylacetic acid into phenol is an example of \nSelect and explain. \nA. Oxidation, B. Reduction, C. Hydrolysis, D. Conjugation', 'role': 'user'}, {'content': "Answer: A \nExplanation: Primary alcohols can be oxidised to make aldehydes, which can then be oxidised to carboxylic acids. Phenols and carboxylic acids can't be oxidised as they don't have a hydrogen atom on the carbon atom to which the OH group is attached.", 'role': 'assistant'}]