This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Drug of choice for plasmodium vivax is \nSelect and explain. \nA. Mefloquine, B. Chloroquine, C. Aesunate, D. Aesunate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chloroquine Chloroquine remains the treatment of choice for clinical cure and suppressive prophylaxis of all types of malaria, except that caused by resistant P.falciparum. In sho time visitors to chloroquine-sensitive endemic areas, suppressive dose should be staed 1 week before and continued for 4 weeks after returning REF : katzung pharmacology : 14th ed', 'role': 'assistant'}]