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': 'Which of the following is related to occipital anchorage \nSelect and explain. \nA. Intra oral force, B. Tipping a tooth, C. Extra oral force, D. Bodily movement of anchor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]