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
Developmental enamel defects are most commonly seen in 
Select and explain. 
A. Primary incisors, B. Primary 2nd molar, C. Permanent incisors, D. Permanent 1st molar
C: Permanent incisors
Answer: C: Permanent incisors 
Explanation: None