This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
Primary ketone body 
Select and explain. 
A. b-hydroxybutyrate, B. Acetoacetate, C. Acetone, D. None
B: Acetoacetate
Answer: B: Acetoacetate 
Explanation: Acetoacetate is the primary ketone body while beta-hydroxybutyrate and acetone are secondary ketone bodies. They are synthesised exclusively by the liver mitochondriaRef: DM Vasudevan - Textbook of Biochemistry, 6th edition, page no: 143