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 does not affect growth? \nSelect and explain. \nA. Oxytocin, B. Somatotropins, C. Thyroid hormone, D. Estrogen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]