This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
[{'content': 'Which of the following is not a cause of cirrhosis? \nSelect and explain. \nA. Nonalcoholic steatohepatitis, B. Cystic fibrosis, C. Hepatitis A, D. a1 Antitrypsin deficiency', 'role': 'user'}, {'content': "Answer: C \nExplanation: Causes of CirrhosisAlcoholismChronic viral hepatitisHepatitis BHepatitis C Autoimmune hepatitis Nonalcoholic steatohepatitis Biliary cirrhosisPrimary biliary cirrhosisPrimary sclerosing cholangitisAutoimmune cholangiopathyCardiac cirrhosisInherited metabolic liver diseaseHemochromatosisWilson's diseasea1 Antitrypsin deficiencyCystic fibrosisCryptogenic cirrhosisRef: Harrison 19e pg: 2058", 'role': 'assistant'}]