Isomerism exhibited by different amines are:
(a) Chain isomers, i.e have different carbon chains, (a) and (b), (c) and (d) as discussed in part (i) and (ii)
Position isomers, i.e. functional group occupy different positions, (b) and (c), (b) and (d), (a) and (d).
(c) Metamers, i.e. different alkyl groups are attached to the same functional group, (e) and (f), (g) and (e).
(d) Functional isomers, i.e. they have different
functional groups. All the three categories (1°, 2° and 3°) of amines are the functional isomers of each other.