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
Approximately how many enamel rods will be present in a maxillary molar? 
Select and explain. 
A. 5 million, B. 7 million, C. 9 million, D. 12 million
D: 12 million
Answer: D: 12 million 
Explanation: The number of enamel rods ranges from 5 million in Lateral incisor and 12 million in upper 1st molar.