This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Malaria Drugs, Subject name: Pharmacology
[{'content': 'The fastest acting schizontocidal drug among the following is: \nSelect and explain. \nA. Aemether, B. Mefloquine, C. Chloroquine, D. Proguanil', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Aemisinin derivatives like dihydroaemisinin, aeether and aemether etc. are fastest acting antimalarial drugs.', 'role': 'assistant'}]