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
True regarding Keratoacanthoma: 
Select and explain. 
A. Central ulceration is uncommon, B. Known as Molluscum sebaceum, C. Caused by pox virus, D. Heals without scarring
B: Known as Molluscum sebaceum
Answer: B: Known as Molluscum sebaceum 
Explanation: 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.