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: Medicine
[{'content': 'Empirical ATT was staed in a patient with FUO. He failed to respond to ATT as the symptoms persisted after few weeks of ATT. How long will you continue the ATT before stopping if no clinical response is noticed? \nSelect and explain. \nA. 4 weeks, B. 6 weeks, C. 8 weeks, D. 10 weeks', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In FUO patients the therapeutic trial for ATT should be continued for 6 weeks. A failure of fever to respond over this period suggests an alternative diagnosis and ATT should be stopped. Ref: Harrison, Edition-18, Page-164.', 'role': 'assistant'}]