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: Orthopaedics
True about Crescent fracture is - 
Select and explain. 
A. Anteroposterior instability with rotational stability, B. Diastasis of pubis with pubic rami fracture, C. Antero-posterior compression is the mechanism of injury, D. Fracture of the iliac bone with sacroiliac disruption
D: Fracture of the iliac bone with sacroiliac disruption
Answer: D: Fracture of the iliac bone with sacroiliac disruption 
Explanation: Crescent fracture is lateral compression type II pelvic fracture (for details, read young and Burgess classification from the text of this chapter).