This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which of the following acts as physiological uncoupler? \nSelect and explain. \nA. Insulin, B. Epinephrine, C. Growth harmone, D. Thyroxine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Examples of physiological uncouplers are:\n\nThyroxine\nThermogenin (presnt in brown adipose tissue)\nLong chain free fatty acid\nUnconjugated Bilirubin', 'role': 'assistant'}]