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
Which of the following test is used to diagnose congenital dislocation of hip? 
Select and explain. 
A. Oolani test, B. Cozen's test, C. McMurray's test, D. None of the above
A: Oolani test
Answer: A: Oolani test 
Explanation: 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.