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': 'All the following  hormones have receptors on the plasma membrane of target tissues except: \nSelect and explain. \nA. Thyrotropin, B. Glucagons, C. Estradiol, D. Epinephrine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]