Which one of the following is an antioxidant vitamin?

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.

Energy released by the hydrolysis of one molecule of $ATP$ is (in $kcal$)

Which of the following is the structure of thymine?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Actin	$(P)$ Transport of respiratory gases
$(2)$ Immunoglobulin	$(Q)$ Immunity
$(3)$ Melanin	$(R)$ Gives color to the body
$(4)$ Hemoglobin	$(S)$ Muscle movement

$A$: Living organisms obtain various molecules and elements from their environment.
$R$: Living organisms synthesize components essential for their body.