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: Pathology
[{'content': 'Hyperthyroidism in children is not associated with: \nSelect and explain. \nA. Periodontal destruction, B. Precocious eruption of teeth, C. Mandibular retrognathism, D. Osteoporosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]