Acid-base character of alcohols

Exercise 1

Rank the following alcohols by increasing acidity and motivate.

c $\lt$ a $\lt$ b $\lt$ d The $+I$ effect of $CH_3$ increases the electron density between $O$ and $H$ and decreases the chances of departure of $H^+$. The $-I$ effect of $Cl$ decreases the electron density between $O$ and $H$ and increases the chances of departure of $H^+$ and particularly as $Cl$ is closer.