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
Tooth with most variable occlusal anatomy: 
Select and explain. 
A. Maxillary third molar, B. Mandibular third molar, C. Maxillary second premolar, D. Mandibular second premolar
A: Maxillary third molar
Answer: A: Maxillary third molar 
Explanation: None