This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
The most radiosensitive tissue among the following? 
Select and explain. 
A. Skin, B. Gut epithelium, C. Germinal cells of the ovary and testis, D. Bone marrow
D: Bone marrow
Answer: D: Bone marrow 
Explanation: RELATIVE TISSUE RADIOSENSITIVITY Radiosensitive tissues Radio-resistant tissues Bone marrow Liver Gut epithelium Kidney Germinal cells of the ovary andtestis Brain Skin Connective tissue Foetal tissues Bone Many tumours Muscle Note: epiphyseal plate is the most radiosensitive area of bone, and the site, which if irradiated, is most likely to result in growth abnormalities.