This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Biochemistry
[{'content': 'Most Common enzyme deficient in galactosemics: \nSelect and explain. \nA. Galactose-1-phosphate uridyl transferase/GALT, B. Galactosidase, C. UDP galactose epimerase, D. Galactokinase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dulcitol or galactitol is the alcohol formed after reduction of galactose by enzyme aldosereductase. Excess dulcitol causes oil drop cataract in galactosemia patients. ADDITIONAL EDGE: C/F LIVER -JAUNDICE, HEPATOMEGALY BRAIN -MENTAL RETARDATION Oil drop cataract in galactosemic patient occurs due to deficiency of enzymes GALT (Classical Type Galactosemia) mainly and Galactokinase (Minor Type Galactosemia). Excess sorbitol (formed after reduction of glucose) causes snow flake cataract in diabetic patients.', 'role': 'assistant'}]