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
False about perikymata is 
Select and explain. 
A. External manifestation of striae of Retzius, B. Mostly seen in cervical region of permanent teeth., C. May be seen on surface of permanent teeth., D. May be seen on surface of primary teeth.
D: May be seen on surface of primary teeth.
Answer: D: May be seen on surface of primary teeth. 
Explanation: Perikymata is absent on the surface of primary teeth.