This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Medicine
[{'content': 'Investigation of choice in Hemobilia? \nSelect and explain. \nA. ERCP, B. Angiography, C. Upper GI endoscopy, D. Barium study', 'role': 'user'}, {'content': 'Answer: B \nExplanation: * Hemobilia is suspected if Upper GI endoscopy shows presence of blood in duodenum but confirmation of diagnosis is done only after angiography. * Celiac axis angiography should always be accompanied with superior mesenteric aeriography because anomalous/accessory right hepatic aery may originate from the SMA.', 'role': 'assistant'}]