This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': "Post pasteurized milk's quality is tested by - \nSelect and explain. \nA. Phosphatase test, B. Methylene blue test, C. Catalase test, D. Oxidase test", 'role': 'user'}, {'content': "Answer: A \nExplanation: Phosphatase test check tge efficiency of pasteurization. It detects inadequate pasteurization or the addition of raw milkREF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-606.", 'role': 'assistant'}]