This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Avascular Necrosis & Osteochondroses, Subject name: Orthopaedics
The most common complication of fracture neck femur is: 
Select and explain. 
A. Non-union, B. Avascular necrosis, C. Arthritis of hip, D. Malunion
B: Avascular necrosis
Answer: B: Avascular necrosis 
Explanation: Ans. B. Avascular necrosisAVN > Non-union > ArthritisIncidence wise, the AVN is the most common complication of fracture neck femur followed by non-union and then arthritis of the hip joint.