This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'All of the following are risk factors for Hepatocellular carcinoma except: \nSelect and explain. \nA. Hepatitis C infection, B. Alcoholism, C. Alfatoxins, D. Animal fat in diet', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Animal fat in diet) Animal fat in diet is a known risk factor for development of colorectal cancer. It has not been mentioned as a risk for hepatocelhdar carcinoma. Risk factors for hepatocellular carcinoma: Major etiological factors Viral infection Hepatitis C infection Hepatitis B infection Chronic alcoholism Other etiological factors Alpha antitrypsin deficiency Hemochromatosis Tyrosinemia Primary biliary cirrhosis Food contaminants: Al fatoxins Exposure to thoriumdioxide or vinyl chloride Long term androgenic steroid administration Exposure to estrogen', 'role': 'assistant'}]