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: Pathology
KLK4 gene mutation is associated with which type of amelogenesis imperfecta? 
Select and explain. 
A. Hypoplastic, B. Hypomaturation, C. Hypocalcification, D. Hypoplastic hypomaturation
B: Hypomaturation
Answer: B: Hypomaturation 
Explanation: None