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
Hunter- Schreger bands not present in: 
Select and explain. 
A. Middle third of enamel., B. Inner third of enamel., C. Outer third of enamel., D. Present all over in enamel.
C: Outer third of enamel.
Answer: C: Outer third of enamel. 
Explanation: None