This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shoulder and arm injuries, Subject name: Orthopaedics
which pa of Proximal humerus fracture has maximum chances of avascular necrosis? 
Select and explain. 
A. One pa, B. Two pa, C. Three pa, D. Four pa
D: Four pa
Answer: D: Four pa 
Explanation: Four pa fracture has a high incidence of avascular necrosis <img alt="" src=" /> Refer : maheshwari 9th ed