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': 'Development of face occurs in the following planes: \nSelect and explain. \nA. Transverse, sagittal, vertical, B. Transverse, vertical, sagittal, C. Sagittal, vertical, transverse, D. Vertical, transverse, sagittal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]