$$ \begin{aligned} &\text { What is ' } Z \text { ' in the given set of reactions? }\\ &\mathrm{C}_6 \mathrm{H}_5 \mathrm{OCH}_3 \xrightarrow{\mathrm{HI}} X+Y \end{aligned} $$

$$ Y \xrightarrow[\text { Anhy. } \mathrm{AlCl}_3]{\mathrm{C}_6 \mathrm{H}_6} \mathrm{Z} $$

The correct statement about the products $B$ and

$C$ in the given reactions are

$$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH} \xrightarrow[\text { Anhy. } \mathrm{ZnCl}_2]{\mathrm{HCl}} A \xrightarrow[\text { AgCN }]{\text { Ethanolic }} \underset{\text { Minor }}{B}+\underset{\text { Major }}{C} $$

I. $B$ and $C$ are functional isomers.

II. With $\mathrm{H}_2 /$ Catalyst $B$ gives $1^{\circ}$ amine and $C$ gives $2^{\circ}$ amine.

III. $B$ on acid hydrolysis given formic acid and C gives $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}_2$.

IV. $C$ forms isocyanate with HgO

In which of the following, intramolecular hydrogen bonding is present?

Identify the incorrect match with respect to compounds to be distinguished and reagent used