This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which of the following is rate limiting enzyme of fatty acid synthesis \nSelect and explain. \nA. Acetyl CoA carboxylase, B. Carnitine acyltransferase I, C. HMG CoA Synthase, D. HMG CoA reductase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Acetyl CoA Carboxylase is the rate limiting enzyme.\n\nIt is activated by Insulin, Citrate.\nInhibited by Glucagon, Palmitoyl CoA.\nIt converts acetyl CoA to Malonyl CoA.\nCarnitine acyltransferase I is the rate limiting enzyme for fatty acid oxidation.\nHMG CoA synthase is RLE for Ketone body synthesis.\nHMG CoA reductase is RLE for Cholesterol synthesis.', 'role': 'assistant'}]