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
Lines of Blaschko represent – 
Select and explain. 
A. Lines along lymphatics, B. Lines along blood vessels, C. Lines along nerves, D. Lines of development
D: Lines of development
Answer: D: Lines of development 
Explanation: Lines of Blaschko represent non random lines of development of skin.