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
Undisplaced fracture patella treated with 
Select and explain. 
A. Tube Cast, B. Nailing, C. Tension band wiring, D. Observation
A: Tube Cast
Answer: A: Tube Cast 
Explanation: None