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: Dental
[{'content': 'Group function occlusion is common in: \nSelect and explain. \nA. 10-14 years, B. 15-25 years, C. Above 30 years, D. Edentulous patients', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]