The number of possible isomers of the compound with molecular formula $C_7H_8O$ is

Match List-$I$ with List-$II$ :

List-$I$	List-$II$
$A$. $H_{3}C-CH(OH)-CH_{3}$	$I$. $(i)$ oleum; (ii) $NaOH, \Delta$; (iii) $H^{+}$
$B$. $CH_{3}COOH \rightarrow CH_{3}CH_{2}OH$	$II$. $(i)$ $O_{2}$; (ii) $H_{2}O/H^{+}$
$C$. $CH_{3}CH_{2}OH \rightarrow H_{3}C-CH(OH)-CH_{3}$	$III$. $(i)$ $CH_{3}OH, H^{+}$; (ii) $H_{2}$, Catalyst
$D$. Benzene $\rightarrow$ Phenol	$IV$. $(i)$ conc. $H_{2}SO_{4}, \Delta$; (ii) $H^{+}/H_{2}O$

Choose the correct answer from the options given below :

Diols $(I-IV)$ which react with $CrO_3$ in aqueous $H_2SO_4$ and yield products that readily undergo decarboxylation on heating,are

Major product of the reaction is

The major product of the above esterification reaction is:

In the following reaction,$\text{Phenol}$ $\xrightarrow{Zn \, \text{dust}} x$ $\xrightarrow[\text{Anhy.} \, ZnCl_2]{CH_3Cl} y$ $\xrightarrow{\text{Alk.} \, KMnO_4} z$. The product $z$ is: