This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
Acute vascular ischemia mainfests as 
Select and explain. 
A. Pulselessness, B. Syncope, C. Flushing, D. Oedema
A: Pulselessness
Answer: A: Pulselessness 
Explanation: Peripheral aery occlusion Clinical features of peripheral aerial occlusion are classically remembered by 5 P's : pain, pallor, pulselessness, paralysis and paraesthesia Some add 6th P: Poililothermia or perishing cold Most common presenting symptom of acute aerial occlusion : Pain Ref: Sabiston 20th edition Pgno :1756