This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
Treatment for fracture neck of femur in a 70 year old patient with avascular necrosis of head of femur? 
Select and explain. 
A. Total hip replacement, B. Total knee replacement, C. Unicondylar knee replacement, D. Hemiahroplasty
A: Total hip replacement
Answer: A: Total hip replacement 
Explanation: THA (Total Hip Ahroplasty) is usually indicated for the patients with a femoral neck fracture who meet the following criteria: Poor general health or frailty. Pathological hip fracture. Severe osteoporosis. Inadequate closed reduction. Displaced fracture that is several days old. Pre-existing hip disease (eg, rheumatoid ahritis, avascular necrosis)(of any age)