In which group are lipids separated during chemical analysis of living tissue?

Fats,on alkaline hydrolysis,give

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.

Highest calories are obtained from:

Lipids are insoluble in water because lipid molecules are:

Which type of lipid is classified into triglycerides and waxes?