This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Efficiency of pasteurization of milk is determined by the following method: \nSelect and explain. \nA. Methylene blue reduction test, B. Phosphatase test, C. Turbidity test, D. Resazurin test', 'role': 'user'}, {'content': "Answer: B \nExplanation: hosphatase test is widely used to check the efficiency of pasteurization. The test is based on the fact that raw milk contains an enzyme called phosphatase which is destroyed on heating at a temperature which corresponds closely with the standard time and temperature required for pasteurization. Other tests of pasteurized milk are, Standard plate count Coliform count Ref: Park's textbook of Preventive and Social Medicine, 19th edition, Page 522.", 'role': 'assistant'}]