Which of the following will not show tautomerism?

The structural isomerism occurring due to the conversion of functional group is  known as tautomerism and the compounds are called tautomers. Condition for a keto-enol tautomerism is at least one α- hydrogen.option (1)    option (2)  CαH3−C||O−Hoption(3)   CH3−C||O−CαH3