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
Type of bone present on labial surface of anterior teeth 
Select and explain. 
A. Cortical, B. Cancellous, C. Exophytic, D. Osteophytic
A: Cortical
Answer: A: Cortical 
Explanation: None