The sources of fats and oils are:

Which fatty acid is responsible for the constant of oil?

Fat on hydrolysis gives which alcohol?

What is lecithin?

Which type of lipid forms a protective layer on the outer surface of the aerial parts of plants?

Following are the statements with reference to 'lipids'.
$(a)$ Lipids having only single bonds are called unsaturated fatty acids.
$(b)$ Lecithin is a phospholipid.
$(c)$ Trihydroxy propane is glycerol.
$(d)$ Palmitic acid has $20$ carbon atoms including carboxyl carbon.
$(e)$ Arachidonic acid has $16$ carbon atoms.
Choose the correct answer from the options given below.