$Methyl$ $acetate$ $(CH_3COOCH_3)$ and $propionic$ $acid$ $(CH_3CH_2COOH)$ are:

How many isomers can be produced from the molecular formula $C_4H_{10}O$?

The two structures written below represent:

$CH_3-CH_2-CH_2-COOH$ and $CH_3-CH(CH_3)-COOH$ are examples of:

Which of the following pairs of molecules are metamers?

Identify the correct statements from the following. Choose the correct answer from the options given below.
$A$. Pentan$-3-$one and Pentan$-2-$one are metamers.
$B$. Butanenitrile and Butaneisonitrile are functional isomers.
$C$. Butan$-1-$ol and Butan$-2-$ol are position isomers.
$D$. Butan$-1-$amine and $N$-methylpropan$-1-$amine are homologous.