The correct option is A Arachdionic
Fatty acids with no carbon-carbon double bonds are said to be saturated those with at least one double bonds are unsaturated. Unsaturated fatty acids with more than one carbon-carbon double bond are referred to as polyunsaturated. Two essential polyunsaturated fatty acids are linoleic acid made up of 18 carbon atoms and having 2 double bonds and linolenic acid made up of 18 carbon atoms and having three double bonds. They cannot be synthesized by mammals and must be supplied in their diet. Arachidonic acid is made up of 20 carbon atoms and has four double bonds.