This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorder of Pigmentation, Subject name: Skin
Following are the differential diagnosis of congenital disorders of pigmentation - 
Select and explain. 
A. Teitz syndrome, B. Piebaldism, C. Tuberous sclerosis, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is 'd' i.e., All the above Differential diagnosis of congenital disorders of pigmentationo Waardenburg syndromes types 1-4o Tietz syndrome o Piebaldismo Woolf's syndromeo Generalized vitiligoo Segmental vitiligoo Vogt-Koyanagi-Harada syndromeo Chemical leukodermao Tuberous sclerosis (hypopigmented macules and patches)o Ziprkowski-Margolis syndrome (X-linked albinism-deafness syndrome)