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
Which of the following is ω9 family? 
Select and explain. 
A. Oleic Acid, B. Linoleic acid, C. Linolenic acid, D. Arachidonic acid
A: Oleic Acid
Answer: A: Oleic Acid 
Explanation: None