This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Prolapse of veebral disc between L5-S1 will affect which nerve root \nSelect and explain. \nA. L4, B. L5, C. S1, D. S2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Since most disc herniations occur posterolaterally, the root that gets compressed is actually the root that exits the foramen below the herniated disc. So, a disc protrusion at L4/L5 will compress the L5 root, and a protrusion at L5/S1 will compress the S1 root . Ref - sciencedirect.com', 'role': 'assistant'}]