This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Etiological Factors of Neoplasia, Subject name: Pathology
[{'content': 'Thorium induced tumor is which of the following? \nSelect and explain. \nA. Renal cell carcinoma, B. Lymphoma, C. Angiosarcoma of liver, D. Astrocytoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Angiosarcoma of the liver is a highly aggressive tumor which is associated with exposure to: Vinyl chloride Arsenic Thorotrast Thorotrast is a suspension containing paicles of the radioactive compound thorium dioxide. It emits alpha paicles due to which it has been found to be extremely carcinogenic.', 'role': 'assistant'}]