Which of the following is a keto-enol tautomeric pair? 
Definitions:
Political Regime
The form of government or a set of rules, cultural or social norms, that regulate the operation of a government or institution and its interactions with society.
Proselytizing
The act of attempting to convert someone to another religion or belief system.
Geographic Location
A specific place or position within a larger context, defined by its longitude, latitude, and other geographical factors.
Collective Mind
The shared beliefs, values, and attitudes of a group that shape its behavior and understanding of the world.
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