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': 'Which of the following lesion shows characteristic anagen, catagen and telogen phases? \nSelect and explain. \nA. Verucca vulgaris, B. Squamous papilloma, C. Keratoacanthoma, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Kerato acanthoma is a self healing carcinoma.\nIt shows growth phase, stationary phase, regression phase.', 'role': 'assistant'}]