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 crowns and roots of primary molar at their cervical portions are more 
Select and explain. 
A. Slender mesiodistally, B. Slender anteroposteriorly, C. Bulkier mesiodistally, D. Bulkier anteroposteriorly
A: Slender mesiodistally
Answer: A: Slender mesiodistally 
Explanation: None