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
All of the following are included as yellow flag signs of low back pain, except: 
Select and explain. 
A. History of systemic steroids use, B. Reliance on Passive Treatment, C. Social Isolation, D. Belief that back pain is severely disabling
A: History of systemic steroids use
Answer: A: History of systemic steroids use 
Explanation: 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.