This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'Essential pentosuria is due to defect in \nSelect and explain. \nA. HMP pathway, B. Glycolysis, C. Gluconeogenesis, D. Uronic acid pathway', 'role': 'user'}, {'content': 'Answer: D \nExplanation: It is an inborn error of metabolism.In the pathway, L-xylulose is conveed to D-xylulose by two enzymes, xylitol dehydrogenase, and xylulose reductase.Absence of any of these enzymes leads to pentosuria.Ref: DM Vasudevan, 7th edition, page no: 135', 'role': 'assistant'}]