This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Viral infections, Subject name: Dental
[{'content': 'True regarding Keratoacanthoma: \nSelect and explain. \nA. Central ulceration is uncommon, B. Known as Molluscum sebaceum, C. Caused by pox virus, D. Heals without scarring', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Central ulceration is very common Known as Molluscum sebaceum Caused by pox virus is a false statement Heals with scarring as it is a severe condition Keratoacanthome (KA) is a relatively common low grade tumor that originates in the pilosebaceious glands and closely resemble squamous cell carcinoma (SCC) Lesion shows central crateriform ulceration or keratin plug that may project like a horn.', 'role': 'assistant'}]