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
In which one of the following does the host factor show bimodal incidence curve ? - 
Select and explain. 
A. Kaposi's sarcoma, B. Osteosarcoma, C. Hodgkin's lymphoma, D. Lung cancer
C: Hodgkin's lymphoma
Answer: C: Hodgkin's lymphoma 
Explanation: None