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: Surgery
[{'content': 'Pharmacological agent causing peliosis hepatis is: \nSelect and explain. \nA. Anabolic steroid, B. Methotrexate, C. Pyrazinamide, D. Interferon Alpha', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Peliosis hepatis is characterized by the presence of cystic, blood-filled spaces of variable size in the liver. Endothelial cells cover the internal surface of these cavities, and adjacent hepatocytes are normal. Pharmacological agents causing peliosis hepatis are 1. Androgenic anabolic steroids and estrogens 2. Immunosuppressive drugs 3. Tamoxifene Ref: World J Gastroenterol 2006 June 14; 12(22): 3612-3615.', 'role': 'assistant'}]