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
True statement about fatty acid: 
Select and explain. 
A. Polyunsaturated FA is essential for membrane structure, B. Biologically arachidonic acid is essential to life, C. Hydrogenated vegetable oils contains Trans fatty acid, D. All
D: All
Answer: D: All 
Explanation: C, B, > A i.e. (Hydrogenated vegetable oils contains Trans fatty acid; Biologically arachidonic acid is essential to life >Polyunsaturated FA is essential for membrane structure)