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': 'Chemoprophylaxis in an Englishman visiting chloroquine and mefloquine ersistant malaria region is done with - \nSelect and explain. \nA. Primaquine, B. Doxycycline, C. Amodiaquine, D. Hydroxychloroquine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Doxycycline", 'role': 'assistant'}]