Which of the following is absent in the structure of steroids?

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

$\beta$-oxidation occurs in .........

Assertion $A$: Lipoproteins are complex lipids.
Reason $R$: The structure of a lipoprotein is formed by fatty acids,alcohol,and a non-lipid component.
Which option is correct for Assertion $A$ and Reason $R$?

$A$: Fats are stored in the body as a reserve food material.
$R$: Lipids are high energy-yielding nutrients.

Match the following columns correctly:

Column-$I$	Column-$II$
$(a)$ Fat	$(i)$ All fatty acids are saturated and long-chained
$(b)$ Oil	$(ii)$ All fatty acids are unsaturated and short or long-chained
$(c)$ Wax	$(iii)$ Alcohol molecule is monohydroxy alcohol
$(d)$ Complex lipid	$(iv)$ Lipid plus non-lipid component