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
Carcinoma in situ of skin is called as: 
Select and explain. 
A. Cowden syndrome., B. Bowen disease., C. Both, D. None
B: Bowen disease.
Answer: B: Bowen disease. 
Explanation: None