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
Most common chances of pulpal exposure will be there if pulpal floor is made perpendicular to the long axis of tooth: 
Select and explain. 
A. Maxillary 1st premolar, B. Maxillary 1st molar, C. Mandibular 1st premolar, D. Mandibular 2nd premolar
C: Mandibular 1st premolar
Answer: C: Mandibular 1st premolar 
Explanation: None