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': 'Highest pickup for gastro juejunocolic fistula is by - \nSelect and explain. \nA. Ba swallow, B. Ba meal, C. Ba enema, D. Ba follow through', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]