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': "When sebaceous cyst of the scalp is ulcerated, excessive granulation tissue forms fungating epithelioma is known as: \nSelect and explain. \nA. Cock's peculiar tumour., B. Sebaceous horn., C. Sequestration dermoid., D. Terstomatous dermoid.", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]