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: Pharmacology
[{'content': 'Which of the following acts on nuclear receptors? \nSelect and explain. \nA. GABA, B. Insulin, C. α1 - receptor, D. Thyroxine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nuclear receptors : Thyroxine, Estrogen, Vitamin D, Vitamin A, Testosterone.\nCytoplasmic receptors : Glucocorticoids, Mineralocorticoids.', 'role': 'assistant'}]