The organic substance that helps in maintaining body temperature is .........

Which of the following is a $16$ carbon fatty acid?

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 $R$?

Which of the following is the correct match for Column $I, II$ and $III$?

Column $I$	Column $II$	Column $III$
$I.$ Stearic acid	$p.$ Short chain	$x.$ Saturated
$II.$ Butyric acid	$q.$ Long chain	$y.$ Unsaturated
$III.$ Crotonic acid
$IV.$ Oleic acid

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

$A$: Linolenic acid is an essential fatty acid.
$R$: Linolenic acid cannot be synthesized in human beings.