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
Optimal location for intra osseous anesthesia for mandibular second molars is 
Select and explain. 
A. Distal to the molar, B. Mesial to the molar, C. In the furcation area, D. Apical perforation and injection
B: Mesial to the molar
Answer: B: Mesial to the molar 
Explanation: None