Which of the following is a fat-soluble vitamin?

Assertion $A$: Living organisms obtain various molecules and elements from their environment.
Reason $R$: Living organisms synthesize components essential for their body.
Which option is correct for Assertion $A$ and Reason $R$?

Match List-$I$ with List-$II$.

List-$I$	List-$II$
$(a)$ Protein	$(i)$ $C=C$ double bonds
$(b)$ Unsaturated fatty acid	$(ii)$ Phosphodiester bonds
$(c)$ Nucleic acid	$(iii)$ Glycosidic bonds
$(d)$ Polysaccharide	$(iv)$ Peptide bonds

Choose the correct answer from the options given below.

Match the following columns:

Column-$I$	Column-$II$
$(1)$ Lipid	$(p)$ Curcumin
$(2)$ Collagen	$(q)$ Morphine
$(3)$ Alkaloids	$(r)$ Intercellular ground substance
$(4)$ Drugs	$(s)$ Lecithin

$A$ substance that prevents or delays oxidation is known as:

Which of the following is $NOT$ a ketone body?