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
Which pa is high sensitive to radioactivity: 
Select and explain. 
A. Adult bone, B. Growing skin, C. Pancreas, D. CNS
B: Growing skin
Answer: B: Growing skin 
Explanation: 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