Identify the product $P$ from the following sequence of reactions?

Which of the following reactions is not an example of a nucleophilic addition-elimination reaction?

Match List-$I$ with List-$II$.
List-$I$ (Reaction):
$A$. Bicyclohexylidene $\rightarrow$ $2$ Cyclohexanone
$B$. Benzene $\rightarrow$ Benzophenone
$C$. Cyclohexanol $\rightarrow$ Cyclohexanone
$D$. Ethylbenzene $\rightarrow$ Potassium benzoate
List-$II$ (Reagents/Condition):
$I$. Benzoyl chloride / Anhydrous $AlCl_3$
$II$. $CrO_3$
$III$. $KMnO_4 / KOH, \Delta$
$IV$. $(i) O_3, (ii) Zn-H_2O$
Choose the correct answer from the options given below:

Which of the following can be used to convert $3$-methylbutan-$2$-one into isopentane?

The $Tishchenko$ reaction is used for the preparation of:

Which of the following compounds gives the $2,4-DNP$ test?