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': "Schober's sign is for: \nSelect and explain. \nA. Flexion of lumbar spine, B. Chest expansion, C. Pain with motion of hip, D. Neck pain and stiffness", 'role': 'user'}, {'content': "Answer: A \nExplanation: * Schober's test is measure of flexion on lumber spine * This test is done in ankylosing spondylitis", 'role': 'assistant'}]