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: Surgery
For distraction of small bone segments rate of distraction should be? 
Select and explain. 
A. 0.3 to 0.5 mm/day, B. 0.5 to 0.7 mm/day, C. 0.7 to 0.9 mm/day, D. 1.0 mm/day
B: 0.5 to 0.7 mm/day
Answer: B: 0.5 to 0.7 mm/day 
Explanation: None