Which of the following is stored in the body as a reserve food material?

Consider the following four statements $(a-d)$ and select the option which includes all the correct ones only $:-$
$(a)$ Lipids are generally water insoluble.
$(b)$ The $R$ group could be a methyl $(-CH_3)$ or ethyl $(-C_2H_5)$ or higher number of $-CH_2$ groups ($1$ carbon to $19$ carbons) in fatty acids.
$(c)$ Palmitic acid has $16$ carbons including the carboxyl carbon.
$(d)$ Arachidonic acid has $21$ carbon atoms including the carboxyl carbon.

How does sterone differ from sterol by the presence of which group?

The maximum percentage of lipid content in lipoproteins is found in:

Which of the following is not a polymeric substance?

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