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
Rate of eruption is fastest for: 
Select and explain. 
A. Anteriors, B. Premolars., C. Molars., D. All of the above.
B: Premolars.
Answer: B: Premolars. 
Explanation: Anteriors – 1mm / month
Premolars – 4.5mm / 3 month
Molar – 1mm / 3month