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: Unknown
[{'content': 'Ketone bodies not utilized by: \nSelect and explain. \nA. Brain, B. RBC, C. Heart, D. Skeletal muscle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Major fuel in different organs', 'role': 'assistant'}]