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': 'In small cell carcinoma of the lung one of the following is not seen - \nSelect and explain. \nA. Hypercalcemia, B. Hyponatremia, C. Watery diarrhoea, D. Hypokalemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]