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: Radiology
[{'content': 'Which of the following layer of epithelium of oral mucous membrane is most sensitive to radiation? \nSelect and explain. \nA. Stratum spinosum, B. Stratum granulosum, C. Stratum basale, D. Stratum corneum', 'role': 'user'}, {'content': "Answer: C \nExplanation: The oral mucosa contains a basal layer composed of rapidly dividing, radiosensitive progenitor cells.\nKey Concept:\nRapidly dividing cells are more susceptible to radiation therapy.\nWhite and Pharoah's Oral\xa0Radiology Principles and Interpretation 8th edition", 'role': 'assistant'}]