This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
Which of the fontanelle is the last to close? 
Select and explain. 
A. Anterolateral, B. Anterior, C. Lateral, D. Occipital
B: Anterior
Answer: B: Anterior 
Explanation: * The posterior fontanelle normally closes 2 to 3 months after bih * The sphenoidal fontanelle is the next to close around 6 months after bih * The mastoid fontanelle closes next from 6 to 18 months after bih; * The anterior fontanelle is generally the last to close between 18-24 months Reference: GHAI Essential pediatrics, 8th edition