<prompt> Mental retardation is not a feature of one of the following Mucopolysaccharidosis?Hurler MPS-IHunter MPS -IISanfillipo MPS -IIIMorquio MPS --IV  <response>: Features of Morquio MPS-IV:HepatosplenomegalySkeletal dysplasia, odontoid hypoplasiaCorneal cloudingGranulated neutrophilsAoic valve diseaseNo mental retardationRef: Harrisons 18e p2452, table 355-1 