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
What is the dose of niclosamide used in treatment of Taenia saginata infection in children ? 
Select and explain. 
A. 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
A: 40 mg/kg single dose
Answer: A: 40 mg/kg single dose 
Explanation: None