This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'Symptoms or signs seen in Acute peripheral aerial occlusion \nSelect and explain. \nA. Pain, B. Pallor, C. Pulselessness, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acute peripheral aerial occlusion may result from: Rupture and thrombosis of an atherosclerotic plaque Embolus from the hea or thoracic or abdominal aoa Aoic dissection Acute compament syndrome Symptoms and signs are sudden onset in an extremity of the 5 P\'s: Pain (severe) Polar sensation (coldness) Paresthesias (or anesthesia) Pallor Pulselessness Ref- <a href=" </div>', 'role': 'assistant'}]