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: Physiology
Membrane fluidity is increased by: 
Select and explain. 
A. Stearic acid, B. Palmitic acid, C. Cholesterol, D. Linoleic acid
D: Linoleic acid
Answer: D: Linoleic acid 
Explanation: D i.e. Linoleic Acid