This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
[{'content': 'Thomas test is used for testing? \nSelect and explain. \nA. Hip flexion, B. Knee flexion, C. Hip abduction, D. Hip rotation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hip flexion REF: Lange book of Ohopedics and Spos Medicine Thomas Test: With the patient lying supine, maximally flex both hips. Allow the femur on the ipsilateral side to fall into as much extension as possible, while holding the other hip up. The angle between the femur and examining table is the residual flexion and represents the flexion contracture. REF : Maheshwari book of ohopedics 6th Ed', 'role': 'assistant'}]