This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Ulcer with undermined edges is seen in \nSelect and explain. \nA. Malignant ulcer, B. Tubercular ulcer, C. Venous ulcer, D. Diabetic ulcer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tubercular ulcers typically have undermined edges. Reference: Bailey & Love&;s Sho Practices of Surgery 27th Edition, Page no. 78', 'role': 'assistant'}]