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 sulcular epithelium acts as a semi permeable membrane through which 
Select and explain. 
A. Bacterial products pass in to the gingiva, B. Fluids from the gingiva seeps in to the sulcus, C. Both of the above, D. None of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: None