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: Anatomy
[{'content': 'Internal fistula is most common between gall bladder and - \nSelect and explain. \nA. Colon, B. Duodenum Ist Pa, C. Jejunum, D. Transverse colon', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Biliary fistula is a complication of gallstone (90% of Biliary fistulas are due to gallstone). The inflamed gall bladder becomes adherent to adjacent stomach, duodenum, colon and necrosis develops at the site leading to the development of fistulas. Most common site of fistula is duodenum 2nd most common site is colon. Ref : Hamilton Bailey, 10/e, p 432', 'role': 'assistant'}]