system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Avascular necrosis of head off the femur is most common in -
assistant
The correct answer is  AVN occurs after fracture at all three sites, but at different frequency.
Here the examiner is not asking about most common site of fracture which causes AVN and the question is of PGI Chandigarh, where more than one options can be correct.