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
Major metabolic pathway in Erythrocytes? 
Select and explain. 
A. b-Oxidation, B. Citric acid cycle, C. Gluconeogenesis, D. Pentose phosphate pathway
D: Pentose phosphate pathway
Answer: D: Pentose phosphate pathway 
Explanation: Major Metabolic FeaturesOrganMajor PathwaysMain SubstratesMajor ProductsExpoedSpecialist EnzymesErythrocytesAnaerobic glycolysis,Pentose phosphatepathwayGlucoseLactateHemoglobin, enzymesof pentose phosphatepathwayRef: Harper&;s Biochemistry; 30th edition; Page no: 150; Table 14-3