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': 'The short term effects of radiation on a tissue are determined by the sensitivity of its: \nSelect and explain. \nA. Mesenchymal cells, B. Ectodermal cells, C. Parenchymal cells, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: The short-term effects of radiation on a tissue (effects seen in the first days or weeks after exposure) are determined primarily by the sensitivity of its parenchymal cells.\nWhite and Pharoah's Oral\xa0Radiology Principles and Interpretation,7th edition", 'role': 'assistant'}]