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
All the following organs produce lactate as the end product of glycolysis in normal conditions except 
Select and explain. 
A. Brain, B. Retina, C. Skin, D. Liver
D: Liver
Answer: D: Liver 
Explanation: Tissues that normally derive much of their energy from glycolysis and produce lactate include brain, gastrointestinal tract, renal medulla, retina, and skin. Lactate production is also increased in septic shock, and many cancers also produce lactate. The liver, kidneys, and hea normally take up lactate and oxidize it, but produce it under hypoxic conditions Reference: Harper; 30th edition; Page no: 172