\text { The major product of the following reactions is }

Arrange the following phenols in decreasing order of their $\mathrm{p} K_a$.

(A) Phenol

(B) ortho - nitrophenol

(C) meta - nitrophenol

(D) para - nitrophenol

Decreasing order of reactivity of the following compounds in the Williamson's ether synthesis is

(II) $\mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2$

(III) $\mathrm{Cl}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$

The correct order of rate of acid mediated dehydration reaction of the following compounds is