$CH_3-CO-CH_2-CH_2-CH_2-CO_2H \xrightarrow[(ii) H_2O, H^+]{(i) NaBH_4} ?$
What will be the final product of this transformation?

The major products $Q$ and $R$ from the following reactions,respectively are:

Provide the structure and common name for the $IUPAC$ names of the acids given in the table below:

Acid hydrolysis of $X$ yields two different organic compounds. Which one of the following is $X$?

$A$ $\xrightarrow[\text{(ii) } H_3O^{+}]{\text{(i) } NaOH} B$ $\xrightarrow[\text{(ii) } H_2SO_4, \Delta]{\text{(i) } EtOH} C$
'$A$' shows positive Lassaigne's test for $N$ and its molar mass is $121$.
'$B$' gives effervescence with aq. $NaHCO_3$.
'$C$' gives fruity smell.
Identify $A, B$ and $C$ from the following.

Which of the following is the correct order of decarboxylation of $\beta$-keto carboxylate anion?