This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fuel in Fed, Fasting and Starvation, Subject name: Biochemistry
[{'content': 'Preferred fuel for body in fasting state: \nSelect and explain. \nA. Carbohydrates, B. Fats, C. Proteins, D. Amino acids', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The preferred fuel for the body in:- Fed state is mainly Carbohydrates i.e. Glucose. Fasting state is mainly Fats. Fats stored in adipose tissues are broken down to fatty acids to give energy during fasting and starvation.', 'role': 'assistant'}]