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: Anatomy
Which of the following structures is not present on the internal surface of mandible? 
Select and explain. 
A. Genial tubercle, B. Mylohyoid ridge, C. Lingula, D. Mental foramen
D: Mental foramen
Answer: D: Mental foramen 
Explanation: Mental foramen is present on the outer surface of body of mandible between the roots of two premolars