This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
In 65 year old male with history of fracture neck of femur 6 weeks old,treatment of choice - 
Select and explain. 
A. SP nailing, B. Mc Murray's osteotomy, C. Hemiarthroplasty, D. None
C: Hemiarthroplasty
Answer: C: Hemiarthroplasty 
Explanation: Treatment of choice for 6 weeks old fracture in a 65-year-old patient is hemiarthroplasty either bipolar (preferred) or monopolar AMR.