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': 'Which  of  the  following  hormones  is an example of a peptide hormone? \nSelect and explain. \nA. Parathormone, B. Adrenaline, C. Cortisol, D. Thyroxine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]