Answer:
The correct option is;
A, B, and C, only
Step-by-step explanation:
The amino group is the functional group of the form CH-NHâ‚‚ consisting of single bonds formed between hydrogen atoms, aryl groups, alkyl groups or two or more of such groups combined together bonded with a nitrogen atom. An amine is an organic compound that has an amino group in its composition or structure
Therefore, the amino group can be found in the molecules of A, B, and C only.