The reaction sequence is: Cyclopentene $\xrightarrow[Cold\, dil.]{KMnO_4 / OH^{-}} X$ $\xrightarrow{HIO_4} Y$ $\xrightarrow{OH^{-} / \Delta} Z$; $Z$ is

The reagent used in the Wolff-Kishner reduction is:

Identify appropriate reagents for the above reaction.

Identify the structure of $B$ in the following reaction sequence:
$2,6-\text{dimethylcyclohexane-1,4-dione} + \text{ethane-1,2-diol}$ $\xrightarrow{H^+} A$ $\xrightarrow[2. H_3O^+]{1. LiAlH_4} B$

What is Fehling solution?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: Acetal/Ketal is stable in basic medium.
Reason $R$: The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium.
In the light of the above statements,choose the correct answer from the options given below: