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': 'Commonest tumour at inner canthus of eye - \nSelect and explain. \nA. Rodent ulcer, B. Dermoid cyst, C. Malignant melanoma, D. Buruli ulcer', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Rodent ulcer", 'role': 'assistant'}]