Which of the following is a phospholipid?

Read the following statements on lipids and find out the correct set of statements:

(a) Lecithin found in the plasma membrane is a glycolipid.

(b) Saturated fatty acids possess one or more $\mathrm{C}=\mathrm{C}$ bonds.

(c) Gingelly oil has a lower melting point, and hence remains as oil in winter.

(d) Lipids are generally insoluble in water but soluble in some organic solvents.

(e) When a fatty acid is esterified with gIycerol, monoglycerides are formed.

Choose the correct answer from the options given below:

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.

Identify the molecules (a) and (b) shown below, and select the right option giving their name and occurrence:
 (a)
 (b)

Rancidity of fats is

Which of the following maintains continuity between the water and lipid phases inside and outside the cells?