Ammonia is a nucleophile.
Nucleophiles attack lowe−density sites.
Nucleophiles are not electron seeking.
Nucleophiles is a Lewis acid.
The option C is incorrect statement. Nucleophile is not a Lewis acid. Nucleophile is rich in electron density and gives its electron density to an electrophile. On the other hand, lewis acid is poor in electron density and accepts electron density from lewis bases.