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: Pathology
[{'content': "Kaposi sarcoma associated with gut may be seen in - \nSelect and explain. \nA. Nonhodgkin's lymphoma, B. HIV - infection, C. Fungal infection, D. Keratoacanthosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: It has been updated to CNS lymphoma', 'role': 'assistant'}]