This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Radiology
[{'content': 'Which pa is high sensitive to radioactivity: \nSelect and explain. \nA. Adult bone, B. Growing skin, C. Pancreas, D. CNS', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Radio sensitivity of different cells or tissues: White blood cells (lymphocytes) Red blood cells (erythrocytes) Immature reproductive cells Epithelial cells Endothelial cells Connective tissue cells Bone cells Nerve cells Brain cells Muscle Ceells', 'role': 'assistant'}]