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: Dental
[{'content': 'Which of the following hormone in pregnancy is more associated blood vessels and increased permeability \nSelect and explain. \nA. Estrogen, B. Prolactin, C. Testosterone, D. Progesterone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]