Three isomers A, B and C (mol. formula C _ 8 H _ 11 N ) give the...

Three isomers A, B and C (mol. formula ${C}_{8}{H}_{11}N$ ) give the following results:

$A$ and $C$$\overset{Dianotization}{\to}P + Q\mathop{\to}_{( ii ) acidation\left({KMnO}_{4} + {H}^{+}\right)}^{( i ) Hydrolyds}R\left(productofA\right) + S\left(productofC\right)$

R has lower boiling point than S

$B\overset{{C}_{6}{H}_{5}{SO}_{2}Cl}{\to}$ alkali-insoluble product

$A, B$ and $C,$ respectively are: