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': 'All of the following statements about leptospirosis are true except - \nSelect and explain. \nA. Infection acquired by direct contact with infected urine, B. Mortality is 5-15% in severe cases, C. Antibodies are usually detectable in the first week, D. IV penicillin is recommended for treatment of severe cases', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]