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: Dental
The area, which is most prone to infection 
Select and explain. 
A. Marginal gingiva, B. Sulcular epithelium, C. Interdental col, D. Attached gingiva
C: Interdental col
Answer: C: Interdental col 
Explanation: None