At $530 \ K$,glycerol reacts with oxalic acid to produce:

$X$ in the above reaction is

Identify $(Z)$ in the above sequence of reactions:
$CH_3-CH_2-CH=CH_2$ $\xrightarrow{HCl/\text{peroxide}} (A)$ $\xrightarrow{EtONa/\Delta} (Z) \text{ (major)}$

The reaction $CH_2 = CH - CH_3 + HBr \rightarrow CH_3CHBr - CH_3$ is

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R.$
Assertion $A :$ Treatment of bromine water with propene yields $1-$bromopropan$-2-$ol.
Reason $R:$ Attack of water on bromonium ion follows Markovnikov rule and results in $1-$bromopropan$-2-$ol.
In the light of the above statements,choose the most appropriate answer from the options given below:

The product $(A)$ of the given oxymercuration-demercuration reaction is: