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': 'An Englishman travels to a place which isresistant to chloroquine and mefloquine. What should he take as prophylaxis ? \nSelect and explain. \nA. Primaquine, B. Hydrchlorquine, C. Proguanil, D. Aesunate', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Proguanil", 'role': 'assistant'}]