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 of choice for treatment of malaria due to P. vivax in a 25 year old pregnant female is : \nSelect and explain. \nA. Chloroquine, B. Primaquine, C. Sulfadoxine-pyrimethamine, D. Quinine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]