In the given reaction sequence,$Y$ is:
Cyclohexanol $\xrightarrow{H^{\oplus}/\Delta} X$ $\xrightarrow[(2) H_2O/Zn]{(1) O_3} Y$

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Cis form of alkene is found to be more polar than the trans form.
Reason $(R)$: Dipole moment of trans isomer of $2$-butene is zero.
In the light of the above statements,choose the correct answer from the options given below:

Alkene can be prepared from alkyl halide by the following reagent: $R-CH_2-CH_2-X + \text{Base} o \text{Alkene} + \text{Base-H} + X^-$

Diimide $(N_2H_2)$ is used to reduce the double bond of:

Which of the following compounds has the least heat of hydrogenation?

$A$ and $B$ respectively are:
$A \xrightarrow[(2) Zn-H_2O]{(1) O_3} \text{Ethane-}1,2\text{-dicarbaldehyde} + \text{Glyoxal}$
$B \xrightarrow[(2) Zn-H_2O]{(1) O_3} 5\text{-oxohexanal}$