How many isoprene units are present in abscisic acid?

Identify the correct statements from the following:
$I)$ When $DNA$ is hydrolysed,adenine and thymine are obtained in equal quantities.
$II)$ When $RNA$ is hydrolysed,adenine and uracil are obtained in equal quantities.
$III)$ Amylose is a branched polymer with $\alpha-1 \rightarrow 4$ and $\alpha-1 \rightarrow 6$ glycosidic linkages.
$IV)$ Addison disease is due to the abnormal functioning of adrenal cortex.

Identify the source of gallic acid from the following.

The correct match between item $I$ and item $II$ is

Item $I$ (compound)	Item $II$ (reagent)
$(a)$ Lysine	$(p)$ $1$-naphthol
$(b)$ Furfural	$(q)$ Ninhydrin
$(c)$ Benzyl alcohol	$(r)$ $KMnO_4$
$(d)$ Styrene	$(s)$ Ceric ammonium nitrate

Which of the following statements are correct?
a) In maltose,$C-1$ of one $\alpha-D$-glucose is linked to $C-4$ of second $\alpha-D$-glucose.
b) Quaternary structure of protein represents spatial arrangement of two or more polypeptide chains with respect to each other.
c) Nucleotide units in a nucleic acid are joined to each other through a phosphodiester linkage.
d) Abnormally low level of thyroxine leads to hypothyroidism.

The functional groups present in the given structure of Cortisone are: