This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lipids, Subject name: Biochemistry
Bile acids are synthesized from - 
Select and explain. 
A. Arachidonic acid, B. Acetyl CoA, C. Linolenic acid, D. Linoleic acid
B: Acetyl CoA
Answer: B: Acetyl CoA 
Explanation: Ans. is 'None > b' i.e., Acetyl CoA o Bile acids are synthesized from cholesterol (which is not provided in options) o Cholesterol itself is synthesized from acetyl CoA. Thus we can consider acetyl - CoA as the answer.