<prompt> Amongst the following fats and oils, highest proportion of poly unsaturated fatty acids PUFA is found in -Safflower oilCoconut oilGroundnut oilButter  <response>: Essential fatty acids:Those that cannot be synthesised by humans.They can be derived from food only.The most important essential fatty acid is linoleic acid, which serves as the basis for production of other essential fatty acids linolenic and arachidonic acid .Not all PUFA are essential fatty acids.Linoleic acid:- dietary source and per cent content .Safflower oil- 73Corn oil- 57Sunflower oil-56Soyabean oil-51Sesame oil-40Ground nut oil-39Mustard oil -15 Palmoil- 9Coconut oil- 2Eichosapentanoic acid: Fish oil: 10 present.Linolenic acid : Soyabean oil-7 