Which of the following is a keto-enol tautomeric pair? 
Definitions:
Organism's Behavior
The observable actions or reactions of living entities in response to external or internal stimuli.
Systematic Desensitization
A behavior therapy used to reduce phobic and anxiety responses through gradual exposure to the feared stimulus, paired with relaxation exercises.
Complex Behaviors
Actions or reactions that involve a combination of skills and attributes such as emotional, cognitive, and social components, resulting in intricate or complicated responses to stimuli.
Flooding
A therapeutic technique used in behavioral therapy to treat phobias and anxiety, involving prolonged exposure to a feared object or situation until the fear response is extinguished.
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