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
Punched out edge is characteristic of which type of
ulcer: 
Select and explain. 
A. Tuberculosis, B. Rodent ulcer, C. Syphillitic, D. Non specific
C: Syphillitic
Answer: C: Syphillitic 
Explanation: None