This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Sodium and Potassium, Subject name: Pediatrics
[{'content': 'Most common cause of hyponatremia in children is? \nSelect and explain. \nA. Excessive sweating, B. Vomiting, C. Syndrome of inappropriate ADH, D. Diuretic use', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common cause of hyponatremia in children - Syndrome of inappropriate ADH.', 'role': 'assistant'}]