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 mesial marginal is a developmental groove present on 
Select and explain. 
A. Maxillary 1st Premolar, B. Maxillary 2nd Premolar, C. Mandibular 1st Premolar, D. Mandibular 2nd Premolar
A: Maxillary 1st Premolar
Answer: A: Maxillary 1st Premolar 
Explanation: None