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
Which is true about carotid stenosis - 
Select and explain. 
A. Ipsilateral hemiplegia by embolism of MCA, B. Bruit indicates severity of steno sis, C. Common in External carotid artery, D. Aspirin reduces risk of TIA
D: Aspirin reduces risk of TIA
Answer: D: Aspirin reduces risk of TIA 
Explanation: None