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
Avascular necrosis is commoner in: March 2012 
Select and explain. 
A. Cuboid, B. Calcaneum, C. Navicular, D. Talus
D: Talus
Answer: D: Talus 
Explanation: Ans: D i.e. Talus Because of the poor blood supply, after a fracture through the neck, the body of talus becomes avascular