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
All are features of Gummatous ulcer except - 
Select and explain. 
A. Punched out edges, B. Syphylitic in nature, C. Wash leather slough, D. Erythematous base
D: Erythematous base
Answer: D: Erythematous base 
Explanation: None