This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contrast Agents, Subject name: Radiology
The Iodine:Paicle ratio is maximum for 
Select and explain. 
A. Ionic monomers, B. Ionic dimers, C. Non-ionic dimers, D. Non-ionic monomers
C: Non-ionic dimers
Answer: C: Non-ionic dimers 
Explanation: -Iodine Paicle Ratio of Ionic Monomer - 3:2 - Ratio of Ionic Dimer - 6:2 - Ratio of Non-ionic Monomer - 3:1 - Ratio for Non-ionic Dimer is - 6:1