This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries to the Leg, Ankle & Foot, Subject name: Orthopaedics
Hawkin sign denotes? 
Select and explain. 
A. Retained vascularity, B. Non union, C. Decrease vascularity, D. Avascular necrosis
A: Retained vascularity
Answer: A: Retained vascularity 
Explanation: Ans. (a) Retained vascularityRef:Rockwood and wilkins' Fractures in children p 1020y Lovell and winter's pediatric orthopaedics vol-l, 6/e,p 1512)