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
Preferred fuel for body in fasting state: 
Select and explain. 
A. Carbohydrates, B. Fats, C. Proteins, D. Amino acids
B: Fats
Answer: B: Fats 
Explanation: 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.