Following are the statements with reference to 'lipids'.

(1) Lipids having only single bonds are called unsaturated fatty acids

(2) Lecithin is a phospholipid.

(3) Trihydroxy propane is glycerol

(4) Palmitic acid has 20 carbon atoms including carboxyl carbon.

(5) Arachidonic acid has 16 carbon atoms.

Choose the correct answer from the options given below.