Which of the following acids does not have a $-COOH$ group?

The major product of the following reaction is
$2-(2-hydroxyethyl)phenol$ $\xrightarrow[2. \, CH_3I \, (1. \, eq.)]{1. \, K_2CO_3}$

The major product of the reaction is $CH_3-CH=CH-C_6H_4-OH + HBr \rightarrow ?$

When phenol is heated with zinc dust,it forms product $X$. What is the product $X$?

Identify the major products $P$,$Q$,and $R$ in the following sequence of reaction:
$\text{Benzene} + CH_3CH_2CH_2Cl$ $\xrightarrow{\text{Anhydrous } AlCl_3} P$ $\xrightarrow[(ii) H_3O^+/\Delta]{(i) O_2} Q + R$

What is the product obtained when salicylic acid is heated with sodalime?