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: Social & Preventive Medicine
[{'content': "In which one of the following does the host factor show bimodal incidence curve ? - \nSelect and explain. \nA. Kaposi's sarcoma, B. Osteosarcoma, C. Hodgkin's lymphoma, D. Lung cancer", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]