This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
[{'content': 'Which hormone act on intracellular receptors- \nSelect and explain. \nA. Thyroxine, B. Glucagon, C. Insulin, D. PDGF', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Thyroxine Hormones with intracellular receptors (Group I hormones)* Cytoplasmic Glucocorticoids (cortisol/cortisone), mineralocorticoids, androgens, progestins.* Nucleus Estrogen, Thyroid hormones (T3 T4), retinoic acid, Vitamin D (Calcitriol or 1,25 (OH)2 D3).", 'role': 'assistant'}]