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: Social & Preventive Medicine
Which of the following has the highest percentage of polyunsaturated fatty acids? 
Select and explain. 
A. Margarine, B. Soya bean oil, C. Palm oil, D. Ground nut oil
B: Soya bean oil
Answer: B: Soya bean oil 
Explanation: Among the given options, soya bean oil has the highest percentage of poly unsaturated fatty acids. Linoleic and linolenic acids are examples of poly unsaturated fatty acids. Soya bean oil has about 51% linoleic acid and 7% of linolenic acid. Linoleic acids is the most impoant essential fatty acid. Ref: Park's Textbook of Preventive and Social Medicine 19th Edition; pages 482 - 483.