Mental retardation is seen in all except

Hurler-Scheie syndrome is a genetic disorder caused by the buildup of glycosaminoglycans (GAGs) in various organ tissues. It is a cutaneous condition, also characterized by mild mental retardation and corneal clouding the Sanfilipposyndrome, resembles both the Hurler and Hunter syndromes, except that the physical defects are relatively mild, whereas the mental retardationis severe. Like the Hurler syndrome, it is transmitted as an autosomal recessive. Ref ganong's review of medical physiology 25e