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': 'Which of the following is not recommended in the treatment of Chronic Low Back Pain? \nSelect and explain. \nA. NSAIDs, B. Bed Rest for 3 months, C. Exercises, D. Epidural steroid injection', 'role': 'user'}, {'content': "Answer: B \nExplanation: In patients with chronic low back pain (CLBP), bed rest should not exceed 2 days. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Page 101; Evidence-Based Chronic Pain Management By Cathy Stannard, Eija Kalso, Jane Ballantyne, Chapter 7", 'role': 'assistant'}]