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: Pediatrics
[{'content': 'A child is brought by mother with HO massive hemetemesis with HO drug intake previously with NSAIDS and on Rx. Associated with moderate splenomegaly diagnosis is \nSelect and explain. \nA. Oesophageal varices, B. Duodenal ulcer, C. Drug induced gastritis, D. Peptic ulcer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes of portal hypertension\n\nPre sinusoidal\nExtrahepatic (most commoon) :portal vein/splenic vein thrombosis,splenic AV fistula,massive splenomegaly.\nIntrahepatic: sarcoidosis, schistosomiasis, congenital hepatic fibrosis, myeloproliferative disorders, nodular degenerative hyperplasia, idiopathic portal fibrosis.\nSinusoidal\nCirrhosis due to any cause.\nPost sinusoidal\nBudd chiari syndrome,right heart failure,constrictive pericarditis,web in inferior venacava.', 'role': 'assistant'}]