This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oxidation of Fatty acids: Ketogenesis, Subject name: Biochemistry
Which of the following is a primary ketone body? 
Select and explain. 
A. Acetoacetate, B. Acetone, C. Beta hydroxy butyrate, D. All are primary
A: Acetoacetate
Answer: A: Acetoacetate 
Explanation: ANSWER: (A) AcetoacetateREF: Harper 27th ed p. 191Acetoacetate is a primary ketone bodyKetone bodies are:AcetoacetateAcetoneBeta hy droxy butyrate