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': 'Corpus rotation in relation to cranium is known as \nSelect and explain. \nA. Matrix, B. Intramatrix, C. Internal rotation, D. Apparent rotation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]