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 the treatment of a pregnant women with P vivax malaria as? \nSelect and explain. \nA. Quinine, B. Chloroquine, C. Aemether, D. Paracetamol', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Chloroquine", 'role': 'assistant'}]