$Gaucher's$ disease is associated with which of the following?

Which of the following fatty acids is not synthesized in the human body?

Select the correct option based on molecular weight.

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.

Which of the following is an example of a long-chain saturated fatty acid?

The sources of fats and oils are: