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': 'Which is not a substrate for gluconeogenesis? \nSelect and explain. \nA. Alanine, B. Fatty acid, C. Pyruvate, D. Lactate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Substrate for gluconeogenesis are: -glucogenic amino acids, lactate, glycerol, propionyl CoA Glucose cannot be produced from fatty acidRef: DM Vasudevan, 7th edition, page no: 120', 'role': 'assistant'}]