How many tautomers can you draw for the following ketone?
1
2
3
4
Definition of Tautomerism -
Tautomers are isomers of a compound that differ only in the position of the protons and electrons. The carbon skeleton of the compound is unchanged. A reaction that involves simple proton transfer in an intramolecular fashion is called tautomerism.
There are 2 possible.
Therefore, option (2) is correct.