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': 'Tissue weighing factor for gonads is \nSelect and explain. \nA. 0.12, B. 0.08, C. 0.04, D. 0.01', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]