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': 'Odontoplasty is indicated in: \nSelect and explain. \nA. Grade I furcation involvement, B. Grade II furcation involvement, C. Grade III furcation involvement, D. Grade IV furcation involvement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]