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
Gingiva is supplied by 
Select and explain. 
A. Supraperiosteal vessels, B. Subperiosteal vessels, C. Apical vessels, D. All of the above
A: Supraperiosteal vessels
Answer: A: Supraperiosteal vessels 
Explanation: None