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
[{'content': "Which of the following test is used to diagnose congenital dislocation of hip? \nSelect and explain. \nA. Oolani test, B. Cozen's test, C. McMurray's test, D. None of the above", 'role': 'user'}, {'content': "Answer: A \nExplanation: Oolani and Barlows test are used to diagnose congenital dislocation of hip. Cozen's test is positive in tennis elbow. McMurray's test is used to detect meniscus injury. Reference: Essential Ohopaedics By J Maheswari, 3rd edition page 201.", 'role': 'assistant'}]