This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Beta oxidation of fatty acids, Subject name: Biochemistry
[{'content': 'Which of the following is true about ketone bodies: \nSelect and explain. \nA. Acetoacetate is most common ketone body present in blood, B. Beta hydroxybutyrate is the first ketone body to be synthesized, C. Thiophorase is absent in liver, D. Muscle can not utilize ketone bodies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ketone Body Synthesis Catabolic pathway Occurs in mitochondria Activated by glucagon Occur in liver 1st ketone body - acetoacetate Most common ketone body - Beta hydroxy butyrate Found in blood and urine Ketone Body Utilization Catabolic pathway Occurs in mitochondria Activated by glucagon Occur in brain, hea and muscles Thiophorase is absent in liver so ketone bodies cannot be utilized by liver.', 'role': 'assistant'}]