<prompt> Waardenburg syndrome is due to mutation ofPAX2 genePAX3 genePAX6 genePAX9 gene  <response>: Ans. b PAX3 geneRef: Robbins 9thpg 140; 8thpg 140Waardenburg syndrome WS:Autosomal dominant inherited conditionHypopigmentation of hair, skin, andor iris of both eyes partial albinism; andor congenital deafness.4 types: Types I and II are the most common forms of Waardenburg syndrome, while types III and IV are rare.Mutations in the EDN3, EDNRB, MITF, PAX3, SNAI2, and SOX10 genes can cause Waardenburg syndrome. 