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
Watson Jones operation is done for- 
Select and explain. 
A. Polio, B. Muscle paralysis, C. Neglected clubfoot, D. Chronic ankle instability
D: Chronic ankle instability
Answer: D: Chronic ankle instability 
Explanation: Watson Jones operation is done for chronic ankle instability.
Note : Watson Jones approach (not Watson - Jones operation) is used for hip surgeries.