This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: GIT and hepatobiliary system, Subject name: Radiology
Radiation tolerance of liver is 
Select and explain. 
A. 15 Gy, B. 30 Gy, C. 40 Gy, D. 45 Gy
B: 30 Gy
Answer: B: 30 Gy 
Explanation: Liver injury tends to be more common in those patients with radiation doses greater than 30 Gy or when the whole-liver is irradiated .It is usually seen as a result of therapy to adjacent organs, such as pancreatic carcinoma, gallbladder carcinoma, retroperitoneal lymphoma, pleural mesothelioma, distal esophageal and other lower thoracic malignancies.