Which of the following is an example of Pinacol-Diazotization?

Match the compounds in Column-$I$ with their $C-O$ bond length in Column-$II$ and $C-O-H$ bond angle in Column-$III$.

Column-$I$ (Name)	Column-$II$ ($C-O$ bond length) and Column-$III$ ($C-O-H$ angle)
$A$. Methanol	$1$. $141 \ pm$,$i$. $109^o$
$B$. Phenol	$2$. $136 \ pm$,$ii$. $111.7^o$
$C$. Methoxymethane	$3$. $142 \ pm$,$iii$. $108.9^o$

In the given reaction sequence,identify the correct reagents to prepare $A$ from $B$. The starting material is benzenesulfonic acid. The reaction with $\Delta / H_3O^+$ yields $B$ (benzene),and the reaction with $1. \text{Fused } NaOH, 2. H^+$ yields $A$ (phenol). Therefore,to prepare $A$ (phenol) from $B$ (benzene),the correct sequence of reagents is:

In which one of the following conversions is phosphorus pentachloride $(PCl_5)$ used as a reagent?

Match List-$I$ with List-$II$.

List-$I$ (Test)	List-$II$ (Observation)
$A$. $Br_2$ water test	$I$. Yellow orange or orange red precipitate formed
$B$. Ceric ammonium nitrate test	$II$. Reddish orange colour disappears
$C$. Ferric chloride test	$III$. Red colour appears
$D$. $2,4-DNP$ test	$IV$. Blue,Green,violet or Red colour appear

Choose the correct answer from the options given below:

Consider all steps and intermediates. Which of the following is a correct statement?