This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Takayasu aeritis mainly affects? \nSelect and explain. \nA. dorsalis pedis, B. Celiac aery, C. Subclavain aery, D. SMA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: takayasu aeriis mainly affects aoa and its main branches and also pulmonary aery Takayasu aeritis of subclan aery in a Caucasian.Takayasu aeritis, an inflammatory and obliterative disease of medium and large aeries, is classified as a giant cell aeritis. It has a predilection for the aoic arch, its main branches, and coronary and pulmonary aeries Ref Davidson 23rd edition pg 456', 'role': 'assistant'}]