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': 'Hormones which act on intracellular receptors both initially in the cytoplasm and ultimately on nuclear receptors are categorized under: \nSelect and explain. \nA. Group I hormones, B. Group II hormones, C. Group III hormones, D. Group IV hormones', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]