This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around the Thigh & Knee, Subject name: Orthopaedics
[{'content': "Test for tight iliotibial band is: \nSelect and explain. \nA. Ober's test, B. Osber's test, C. Simmand's test, D. Charnley's test.", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Ober's test Ober's test is for tight ilio tibial band {eg. in Polio)", 'role': 'assistant'}]