This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cataract, Subject name: Ophthalmology
Cataract is seen in all of the following EXCEPT: 
Select and explain. 
A. Wilson's disease, B. Diabetes mellitus, C. Hereditary fructose intolerance, D. Galactosemias
C: Hereditary fructose intolerance
Answer: C: Hereditary fructose intolerance 
Explanation: In case of diabetics sugar alcohols (sorbitol) is present, which is hygroscopic in nature i.e. they absorb water. So, if this sugar alcohol is present in excess in cells, it will cause cell swelling. Especially it gets accumulated in lens of the eye causing cataract. 1. Glucose forms Sorbitol which gives rise to Snow Flake Cataract 2. Galactose forms Galactitol/Dulcitol which gives rise to Oil Drop Cataract Wilson's disease: (Condition of Cu excess in body): Leads to Sun Flower Cataract. No cataract is seen in case of Hereditary Fructose Intolerance. Diabetic Cataract - Snowflake on breadcrumb cataract Kayser Fleisher ring: Seen in Wilson's disease