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
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 pigmentation Waardenburg syndromes types 1-4 Tietz syndrome Piebaldism Woolf's syndrome Generalized vitiligo Segmental vitiligo Vogt-Koyanagi-Harada syndrome Chemical leukoderma Tuberous sclerosis (hypopigmented macules and patches) Ziprkowski-Margolis syndrome (X-linked albinism-deafness syndrome)