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
Which of the following disease occurs along Blaschko lines? 
Select and explain. 
A. SJS, B. Inverse psoriasis, C. Incontinentia pigmentosa, D. Intertigo
C: Incontinentia pigmentosa
Answer: C: Incontinentia pigmentosa 
Explanation: Blaschko lines are lines of skin cell migration during embryogenesis, which are longitudinally oriented on limbs & curved on trunk.
Diseases that occur along Blaschko lines are Incontinentia pigmentosa, Nevus depigmentosus.