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': 'What is the dose of niclosamide used in treatment of Taenia saginata infection in children ? \nSelect and explain. \nA. 40 mg/kg single dose, B. 40 mg/kg/day for 3 days, C. 40 mg/kg/day for 7 days, D. 40 mg/kg/day for 21 days', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]