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
Growth estimation is done by: 
Select and explain. 
A. Frontal bone, B. Cervical vertebrae, C. Capitate, D. Clavicle
B: Cervical vertebrae
Answer: B: Cervical vertebrae 
Explanation: None