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': 'In transitional phase of secretory stage: \nSelect and explain. \nA. Ameloblasts undergo apoptosis, B. 25% of cells die during transitional phase, C. Cell volume and organelle decreases, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Transitional Phase of the Presecretory Stage\n\nAmeloblasts undergo significant morphological changes.\nHeight of cell reduces.\nCell volume and organelle decreases.\nAmeloblasts undergo programmed cell death (Apoptosis)\n25 of cells die during during transitional phase.', 'role': 'assistant'}]