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
The Y shaped central developmental groove is most likely found on which of the following premolars? 
Select and explain. 
A. Maxillary first., B. Mandibular first., C. Maxillary second., D. Mandibular second.
D: Mandibular second.
Answer: D: Mandibular second. 
Explanation: Y shaped central developmental groove is found on the mandibular second premolar.