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': 'HIV cases are reported from all over word. This is \nSelect and explain. \nA. Endemic, B. Hyperendemic, C. Pandemic, D. Sporadic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]