The reaction of $C_2H_5OH$ with $H_2SO_4$ does not give

Major products $(C)$ and $(D)$ will be respectively:

In the Victor-Meyer's test,the colours given by $1^o$,$2^o$,and $3^o$ alcohols are respectively:

Compound $A, C_{8}H_{10}O,$ is found to react with $NaOI$ (produced by reacting $Y$ with $NaOH$) and yields a yellow precipitate with a characteristic smell. $A$ and $Y$ are respectively:

An organic compound $X$ on treatment with $PCC$ in dichloromethane gives the compound $Y$. Compound $Y$ reacts with $I_{2}$ and alkali to form a yellow precipitate of triiodomethane. The compound $X$ is

Which of the following alcohols will undergo dehydration most easily?