Question

what are three types of carbanions

Answer 1

one (e.g,acetylide anion),two (e.g,phenyl anion),three (e.g, methyl anion)

Answer 2

carbanions are anions in which carbon is tervalent that is it forms three bonds and bears a formal negative charge in at least one significant mesmerized contributor.
Examples of carbanions are:Methide ion, methyl anions, phenyl anion and acetylide anion.