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: Surgery
A 65 year female presents with impacted fracture surgical neck of humerus. Treatment of choice is: 
Select and explain. 
A. Ahroplasty, B. Arm-Chest strapping, C. Triangular sling, D. Wait and watch
C: Triangular sling
Answer: C: Triangular sling 
Explanation: C i.e. Triangular sling