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': 'Following fistulous conditions give rise to maximum fluid and electrolyte imbalance - \nSelect and explain. \nA. Distal ileal, B. Gastric, C. Duodenal, D. Sigmoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: • Enterocutaneous fistulas are classified according to their location and volume of daily output.\n• These factors dictate both treatment and morbidity and mortality rates.\n• In general, the more proximal the fistula in the ‘intestine’ (but not the stomach), the more serious the problem, with greater fluid and electrolyte loss.\n• Maximum fluid and electrolyte imbalance occur in duodenal fistulas', 'role': 'assistant'}]