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: Pharmacology
[{'content': 'Drug not given for malaria prophylaxis is : \nSelect and explain. \nA. Chloroquine, B. Proguanil, C. Doxycycline, D. Artesunate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]