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': 'Most radiosensitive of the following is: \nSelect and explain. \nA. Ca cervix, B. Ca kidney, C. Ca Ovary, D. Ca Pancreas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Ca Ovary', 'role': 'assistant'}]