The correct option is D All of these
Simple lipids are esters of fatty acids with alcohol (mostly glycerol). Simple lipids can be further subdivided into fats and oils, and waxes. Fats and oils are esters of fatty acids with glycerol. Majority of them are triglycerides. They are found in ghee, mustard oil.
Waxes are esters of long chain fatty acids and long chain alcohols. They form a water insoluble coating. They are found in beeswax, cerumen or earwax.