<prompt> This boy presented with noisy breathing, stiff immobile joints mental retardation. What can be the probable cause?Down syndromeHurler syndromeNeurofibromatosisSturge weber syndrome  <response>: Ans. B. Hurler syndromeThe image above shows features of Gargoylism having coarse facial features. Children suffering from this have mental retardation and joint stiffness. These features are characteristics of Hurler syndrome. 