This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals in Radiology, Subject name: Radiology
[{'content': 'Non-Iodine containing contrast is - \nSelect and explain. \nA. Gd DTPA, B. Visipaque, C. Iohexanol, D. Diatrozoate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Gd DTPA is non iodine containing contrast agent', 'role': 'assistant'}]