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: Medicine
[{'content': 'Co-arctation of aorta may be associated with all of the following except - \nSelect and explain. \nA. Bicuspid aortic value, B. Turner syndrome, C. Renal artery stenosis, D. PDA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]