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': 'Which is not used in pasteurization - \nSelect and explain. \nA. Phosphatase test, B. Methylene blue test, C. Coliform count, D. Standard plate count', 'role': 'user'}, {'content': "Answer: B \nExplanation: Methylene blue reduction test is an indirect method for detection of microorganism. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 606", 'role': 'assistant'}]