Identify the following organic compounds and choose the correct option.
Even though the structure of lecithin is unfamiliar, we can easily guess that it's neither of the other three molecules, given as options. Lecithins are usually phospholipids, composed of phosphoric acid with choline, glycerol or other fatty acids usually glycolipids or triglyceride. Once we arrive on the second molecule its very apparent that it is made up of the familiar monosaccharides- a glucose and a galactose moiety in a beta 1-4 glycosidic linkage forming the milk sugar lactose, the third molecule is glycerol, a basic part of lipid molecules, and the fourth molecule is the cyclic ring structure of the nitrogenous base - Uracil.