This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Presumptive treatment of malaria in a chloroquine resistant area: \nSelect and explain. \nA. Chloroquine + pyrimethamine, B. Sulphalene + pyrimethamine, C. Chloroquine + primaquine, D. Sulphalene 1000 mg', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' ie sulph lene + pyrimethamine Presumptive treatment in Chloroquine resistant areaSingle dose of 25 mg/kg body wt. sulfalene/sulfadoxine and 1.25 mg/kg body wt. Pyrimethamine combination and thereafter tab. Primaquine 0.75 mg/kg body wt.", 'role': 'assistant'}]