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': "According to Johnson's classification prepyloric Plus duodenal ulcers is \nSelect and explain. \nA. Type 1, B. Type 2, C. Type 3, D. Type 4", 'role': 'user'}, {'content': 'Answer: B \nExplanation: TYPE\nLOCATION\n\n\nI\nLesser curve at incisura\n\n\nII\nGastric body with duodenal ulcer\n\n\nIII\nPrepyloric\n\n\nIV\nHigh on lesser curve\n\n\nV\nAnywhere', 'role': 'assistant'}]