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: Surgery
[{'content': 'Dissection of which aery is seen in pregnancy - \nSelect and explain. \nA. Carotid aery, B. Aoa, C. Coronary A, D. Femoral aery', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is 'b' i.e. Aoa", 'role': 'assistant'}]