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': 'Maximum radiation dose tolerable tissue is- \nSelect and explain. \nA. Hemopoietic tissue, B. Testis, C. Ovary, D. Bone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A bone is a rigid organ that constitutes part of the vertebrate skeleton.\nBones support and protect the various organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body,\nand enable mobility.', 'role': 'assistant'}]