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
Most common presenting symptom of acute arterial occlusion: 
Select and explain. 
A. Pain, B. Pallor, C. Pulselessness, D. Paralysis
A: Pain
Answer: A: Pain 
Explanation: Peripheral Arterial Occlusion

Clinical features of peripheral arterial occlusion are classically remembered by 5 Ps: Pain, Pallor, Pulselessness, Paralysis and Paraesthesia (or anesthesia)
Some add 6th P: Poikilothermia or perishing cold
MC presenting symptom of acute arterial occlusion: Pain