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
Athletic sustained an injury around the knee joint suspecting cailage damage, which of the following is an investigation of choice? 
Select and explain. 
A. Pain X ray, B. Clinical examination, C. Ahroscopy, D. Ahrotomy
C: Ahroscopy
Answer: C: Ahroscopy 
Explanation: C i.e. Ahroscopy Ahroscopy followed by MRI is investigation of choice for ligamentous injury of kneeQ.