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: Dental
[{'content': 'The following tests are used to check the efficiency of pasteurization of milk except: \nSelect and explain. \nA. Phosphatase test, B. Standard plate count, C. Coliform count, D. Methylene blue reduction test', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The following test have been used to check the eﬃciency of pasteurization of milk:\n\nPhosphatase test\nStandard plate count\nColiform count.\n\nDye Reduction Test: Methylene Blue\nThe methylene blue reduction test is based on the fact that the color imparted to milk by the addition of a dye such as methylene blue will disappear more or less quickly. The removal of the oxygen from milk and the formation of reducing substances during bacterial metabolism causes the color to disappear.', 'role': 'assistant'}]