The number of isomeric ethers with molecular formula $C_4H_{10}O$ is:

The major product of the above esterification reaction is:

List-$I$ contains reactions and List-$II$ contains major products. Match each reaction in List-$I$ with one or more products in List-$II$ and choose the correct option.

The major product in the following reaction sequence is:

Column $(I)$ contains products and Column $(II)$ contains the processes to prepare them. Match the processes in Column $(II)$ with the products in Column $(I)$.

Column - $(I)$ Product	Column - $(II)$ Preparation Process
$(A)$ Butan$-1-$ol	$(i)$ Hydration of propene in the presence of dilute sulfuric acid
$(B)$ Propan$-2-$ol	$(ii)$ Reaction of propanone with methylmagnesium bromide followed by hydrolysis
$(C)$ $2-$Methylpropan$-2-$ol	$(iii)$ Hydroboration of propene followed by reaction with $(NaOH + H_2O_2)$
$(D)$ Propan$-1-$ol	$(iv)$ Catalytic reduction of butanal

Which of the following is an example of Pinacol-Diazotization?