This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Disease which can be transmitted by milk \nSelect and explain. \nA. Q fever, B. Poliomyelitis, C. Whooping cough, D. Diphtheria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Q fever caused by C.burnetii. In milk, it may survive even after pasteurization by the holder method. It can remain infectious for months in milk, water, soil and wool. The organism is shed in the milk of infected cat. Ref: Baveja textbook of microbiology; 4th edition', 'role': 'assistant'}]