This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Skin, Subject name: Skin
Lines of Blaschko's are related to - 
Select and explain. 
A. Keratinocytes, B. Blood vessels, C. Nerves, D. Bones
A: Keratinocytes
Answer: A: Keratinocytes 
Explanation: Ans. is 'a' i.e., Keratinocytes o Blaschko's lines correspond to the pathways followed by keratinocytes migrating from neural crest during embryogenesis.o The lines follow a V-shape over spine, an S-shape on abdomen, inverted U-shape from breast area to upper arm and perpendicular down the front and back of the lower extrimities.o A number of inflammatory conditions can follow Blaschko's lines -Lichen striatusLinear lichen planus.Inflammatory linear verrucous epidermal naevus (ILVEN).Blaschko dermatitis (Blaschtitis).Incontinentia pigmenti.Goltz syndrome.Linear morphoea.Segmental vitiligo.xi) Focal dermal hypoplasia.CHILD syndrome.Hypomelanosis of Ito.Linear cutaneous lupus erythematosus.