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
Ketone bodies are formed in: 
Select and explain. 
A. Liver, B. Pancreas, C. Kidneys, D. Lungs
A: Liver
Answer: A: Liver 
Explanation: Ketone bodiesThey are three different water-soluble biochemicals that are produced as by-products when fatty acids are broken down for energy in the liver.Two of the three are used as a source of energy in the hea and brain while the third (acetone) is a waste product excreted from the body.In the brain, they are a vital source of energy during fasting.The three endogenous ketone bodies are- Acetone,Acetoacetic acid, and- Beta-hydroxybutyric acid