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': 'A 44-year-old man presented with acute onset of low backache radiating to the right lower limb. Examination revealed SL \nSelect and explain. \nA. Prolapsed interveebral disc L4-5, B. Spondylolysis L5-S1, C. Lumbar canal stenosis, D. Spondylolisthesis L4-5', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Prolapsed interveebral disc L1-5', 'role': 'assistant'}]