Identify the structures $P$ and $Q$ given below.

Assertion $A$: Cholesterol is a lipid that does not contain fatty acids.
Reason $R$: Cholesterol does not contain a $-COOH$ or $>C=O$ group.
Which option is correct for Assertion $A$ and Reason $R$?

$S$ - Statement: Lipids that contain non-lipid components in addition to alcohol and fatty acids in their structure are called complex lipids.
$R$ - Reason: Lipoproteins contain protein as a non-lipid component in their structure.

Which fatty acid is represented by the formula $CH_3-(CH_2)_{16}-COOH$?

What is the ratio of $H$ to $O$ in the structure of fats?

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 $R$?