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
Rhythm of Distraction osteogenesis as advised by Ilizarov? 
Select and explain. 
A. Continuous, B. 0.25 mm four times a day., C. 0.33 mm three times a day., D. 1.0 mm four times a day.
B: 0.25 mm four times a day.
Answer: B: 0.25 mm four times a day. 
Explanation: None