$PCC$ (Pyridinium chlorochromate) is a good reagent for which of the following transformations?

Optically active $2-$octanol rapidly loses its optical activity when exposed to

$Ph-C(OH)(Ph)-C(OH)(CH_3)_2$ $(A)$ $+$ $Ph-C(OH)(Ph)-C(OH)(Et)_2$ $(B)$ $\xrightarrow{H_2SO_4}$
$(p)$ $Ph-C(Ph)(CH_3)-CO-CH_3$
$(q)$ $Ph-C(Ph)(Et)-CO-Et$
$(r)$ $Ph-C(Ph)(Et)-CO-CH_3$
$(s)$ $Ph-C(Ph)(CH_3)-CO-Et$
When $(A)$ and $(B)$ react with $H_2SO_4$,the products obtained are:

In the following sequence of reactions,
$C_{3}H_{6}$ $\xrightarrow{H^{+}/H_{2}O} A$ $\xrightarrow[dil. KOH]{KIO} B + C$
The compounds $B$ and $C$ respectively are :

Ethanol cannot be dried by anhydrous $CaCl_2$ due to the formation of the following solvated product:

Which among the following is a Lucas reagent?