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': 'In a ulcer over skin if there is undermined edges it suggests \nSelect and explain. \nA. Syphilis, B. Tuberculosis, C. Cancerous ulcer, D. Venous ulcer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Flat sloping venous or septic, often with a transparent healing edge along pa of its circumference. Punched-out syphilitic, trophic, diabetic, ischaemic, leprosy. Undermined tuberculosis, pressure necrosis paicularly over the buttocks, carbuncles. Raised rodent ulcer , often with a slightlyrolled appearance. Raised and eveed carcinoma Hamilton bailey 19th edition Pg 64', 'role': 'assistant'}]