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: Physiology
[{'content': 'True about intracellular receptors: \nSelect and explain. \nA. Mainly on nuclear surface, B. GH act on it, C. Estrogen does not act on it, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Mainly on nuclear surface', 'role': 'assistant'}]