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: Anatomy
[{'content': 'Which is true regarding umbilical cord: \nSelect and explain. \nA. Two aeries, B. Umblical cord pulsation rate corresponds to maternal pulsation rate, C. Covered by amnion and chorion, D. Two veins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Two aeries', 'role': 'assistant'}]