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MissPhiladelphia
I think the correct answer from the choices listed above is option D.It is the NH2 group that is present in amine compounds. Amines are formally derivatives of ammonia, wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group.
Leomangu

Answer:NH2 group

Explanation:

The NH2 group, is the group that conform the amines groups. Also, in organic chemistry, this gruop is the base and in the most common reactions works like that, for example:

R-COOH + R'-NH2 ---> RCOO-NH-R' +H2O

The amine group reacts with carboxylic group and produce a salt and water

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