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': 'All of the following are included as yellow flag signs of low back pain, except: \nSelect and explain. \nA. History of systemic steroids use, B. Reliance on Passive Treatment, C. Social Isolation, D. Belief that back pain is severely disabling', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. History of systemic steroids use History of cancer, significant trauma, weight loss, temperature > 37.6degC, risk factors for infection, neurological deficit, minor trauma in patients (> 50 years of age, known to be osteoporotic or taking coicosteroids) no improvement over 1 month are red flag (dangerous) signs.', 'role': 'assistant'}]