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': 'The development of resistance to conventional treatment has led WHO to recommend the use of combination therapies containing artemisinin derivative (artemisinin-based combination therapies also known as ACTs). All of the following combination therapies are recommended if such resistance is suspected, except : \nSelect and explain. \nA. Artemether plus lumefantrine, B. Artesunate plus quinine, C. Artesunate plus pyrimethamine-sulfadoxine, D. Artesunate plus mefloquine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]