This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiac and Pericardiac Imaging, Subject name: Radiology
[{'content': 'Which of this in an embolization agent? \nSelect and explain. \nA. Gel foam, B. PVA, C. Autologous blood clot, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans DCatheter embolization places medications or synthetic materials called embolic agents through a catheter into a blood vessel to block blood flow to an area of the body. It may be used to control or prevent abnormal bleeding, close off vessels supplying blood to a tumor, eliminate abnormal connections between arteries and veins, or to treat aneurysms. Embolization is a highly effective way to control bleeding and is much less invasive than open surgery.List of embolization agents are:Temporary: Gelfoam, collagen, thrombin.Permanent:i Particles; PVA, Embospheresii Coils: Pushable, Injectable, Detachable.iii Liquid Agents: Glue, onyx, alcohol, ALGEL.iv Others: Balloons, Amplatzer Plugs, GGVOD.', 'role': 'assistant'}]