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': 'Surgical orthodontic treatment is required in: \nSelect and explain. \nA. Maxillary teeth proclined, B. Abstraction, C. Skeletal Class III, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Proclination correction and abstraction are usually done with fixed therapy itself.', 'role': 'assistant'}]