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': 'Shape and size of the teeth are determined by which stage: \nSelect and explain. \nA. Initiation., B. Apposition., C. Morphodifferentiation., D. Histodifferentiation.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Morphodifferentiation\nThe morphologic pattern, or basic form and relative size of the future tooth, is established by morphodifferentiation, that is, by differential growth. Morphodifferentiation therefore is impossible without proliferation.', 'role': 'assistant'}]