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: Skin
Which of the following is an X-linked dominant condition presenting as hyperpigmented lesions along lines of Blaschko? 
Select and explain. 
A. Incontinentia pigmenti, B. Hypomelanosis of Ito, C. LEOPARD syndrome, D. Pseudoxanthoma elasticum
A: Incontinentia pigmenti
Answer: A: Incontinentia pigmenti 
Explanation: X-linked dominant trait due to mutation in NEMO gene presents as 4 distinct clinical stage in girls. Stage 1: inflammatory macules, papules, vesicles and pustules Stage 2: hyperkeratotic and verrucous lesions Stage 3: grey-brown pigmentation Stage 4: atrophic, hypopigmented and depigmented bands Ref: Rook's textbook of dermatology, 8th edition, Pg 58.16.