Which of the following reactions is used to prepare toluene from bromobenzene?

What is the product $X$ in the following Wurtz-Fittig reaction?

$[P]$ on treatment with $Br_{2}/FeBr_{3}$ in $CCl_{4}$ produced a single isomer $C_{8}H_{7}O_{2}Br$ while heating $[P]$ with sodalime gave toluene. The compound $[P]$ is:

Assertion : $p-$nitroacetophenone $(p-O_2N-C_6H_4-COCH_3)$ is prepared by Friedel-Crafts acylation of nitrobenzene.
Reason : Nitrobenzene easily undergoes electrophilic substitution reaction.

In the given reaction sequence,the conversion of $Y$ to $Z$ is:

Which chloroderivative of benzene among the following would undergo hydrolysis most readily with aqueous $NaOH$ to furnish the corresponding hydroxy derivative?