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
Non-Iodine containing contrast is - 
Select and explain. 
A. Gd DTPA, B. Visipaque, C. Iohexanol, D. Diatrozoate
A: Gd DTPA
Answer: A: Gd DTPA 
Explanation: Gd DTPA is non iodine containing contrast agent