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: Pathology
[{'content': 'The least radio sensitive tissue is \nSelect and explain. \nA. Nervous tissue, B. Bone, C. Kidney, D. Thyroid', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Bone", 'role': 'assistant'}]