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: Pathology
Blashco's lines are present along the 
Select and explain. 
A. Nerves, B. Lymphatics, C. Vessels, D. Lines of development
D: Lines of development
Answer: D: Lines of development 
Explanation: Blaschko's Lines: a. The lines of Blaschko were delineated over 100 years ago. b. First described by Blaschko in 1901. The pattern is attributed to the lines of migration and proliferation of epidermal cells during embryogenesis (i.e., the bands of abnormal skin represent clones of cells carrying a mutation in a gene expressed in the skin).