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: Pathology
[{'content': "Typhoid ulcer is - \nSelect and explain. \nA. Ulceration of the Peyer's patch, B. Longitudinal ulcer, C. May perforate, D. All of the above", 'role': 'user'}, {'content': 'Answer: D \nExplanation: All of the above', 'role': 'assistant'}]