The number of all primary amines possible with the molecular formula ${\mathrm{C}}_3{\mathrm{H}}_9 \mathrm{N}$ and the primary amine with amino group on a primary carbon atom is given by the set

The correct order of decreasing basic strength is

For the compounds

The order of basicity is

Which is/are correct statements?

Consider the following sequence of reactions.

The end product $\left(\mathrm{C}\right)$ is