This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Air, Light, Sound, Housing, Radiation, Waste Disposal, Subject name: Social & Preventive Medicine
[{'content': 'Pasteurized milk is most commonly tested by? \nSelect and explain. \nA. Phosphatase test, B. Coliform test, C. Catalase test, D. Oxidase Test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Phosphatase test is conducted on pasteurized milk to detect the presence of heat-labile phosphatase enzyme in pasteurized milk.', 'role': 'assistant'}]