This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arthritis, Subject name: Orthopaedics
[{'content': 'Loose body in joint most common site is - \nSelect and explain. \nA. Knee, B. Hip, C. Elbow, D. Ankle', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Knee Loose body in jointo A loose body is a free-floating piece of bone, cartilage or foreign object in a joint,o The knee is the most common joint where one would find a loose body.o Causes of loose bodies include :-OsteoarthritisOsteochondritisdessicansOsteochondral fracture(injury)Charcot's diseaseSynovial chondromatosis", 'role': 'assistant'}]