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: Dental
Tooth Brush has bristles arranged in 
Select and explain. 
A. 2 -3 rows, B. 2-4 rows, C. 3-4 rows, D. 1-2 rows
B: 2-4 rows
Answer: B: 2-4 rows 
Explanation: None