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': 'A person wants to visit a malaria endemic area of low level chloroquine resistant falciparum malaria.The best chemoprophylaxis is - \nSelect and explain. \nA. Chloroquine, B. Proguanil + Pyrimethamine, C. Sulfadoxine + Pyrimethamine, D. Mefloquine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]