The major product of the following reaction is:

Identify the name of the reaction in which an aryl halide reacts with an alkyl halide and sodium metal in dry ether to produce substituted aromatic compounds.

The reaction of compound $P$ with $CH_3MgBr$ (excess) in $(C_2H_5)_2O$ followed by addition of $H_2O$ gives $Q$. The compound $Q$ on treatment with $H_2SO_4$ at $0^{\circ}C$ gives $R$. The reaction of $R$ with $CH_3COCl$ in the presence of anhydrous $AlCl_3$ in $CH_2Cl_2$ followed by treatment with $H_2O$ produces compound $S$ [$Et$ in compound $P$ is ethyl group].
$(1)$ The product $S$ is
$(2)$ The reactions,$Q$ to $R$ and $R$ to $S$,are

$A$. Dehydration and Friedel-Crafts acylation	$B$. Aromatic sulfonation and Friedel-Crafts acylation
$C$. Friedel-Crafts alkylation,dehydration and Friedel-Crafts acylation	$D$. Friedel-Crafts alkylation and Friedel-Crafts acylation

Given the answer question $(1)$ and $(2)$

Which is the best synthesis of $1-$methoxy$-2,4-$dinitrobenzene?

Chlorobenzene on heating with concentrated $HNO_3$ in the presence of concentrated $H_2SO_4$ gives:

$1$-$Chloro$-$4$-$nitrobenzene$,$1$-$Chloro$-$2,4$-$dinitrobenzene$ and $1$-$Chloro$-$2,4,6$-$trinitrobenzene$ are transformed to corresponding phenols with the reagents $X$,$Y$,$Z$ respectively. What are $X$,$Y$,$Z$?