This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inborn Errors of Metabolism, Subject name: Pediatrics
'Cloudy cornea' is a feature of? 
Select and explain. 
A. Hurler's disease, B. Morquio's disease, C. Maroteaux Lamy disease, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D. All of the above. (Ref Essential Paediatrics by OP Ghai 7th/pg. 637)'Cloudy cornea' is known to be a feature of Hurler's disease/IH, Scheie's disease/IS, Morquio's disease/IV and Maroteaux Lamy disease/VI.C/f of mucopolysaccharidoses:Eponyms/MPS numbersMentalretardationCoarse faciesHepatospleno-megalyDysostosismultiplexCorneal clouding1. Hurler/IH+++++2. Scheie's/IS----+3. Hunter/U++++-4. Sanfilipo/lll+----5. Morquio/IV---++6. Maroteaux-Lamy / VI---++7. Sly/VII--++-Features of Hurler Syndrome:# H: Hepatosplenomegaly# U: Ugly facies# R: Recessive (AR)# L: L-iduronidase deficiency# E: Eyes (Cornea) clouded# R: Retarded mentally# S: Short stubby fingers