This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Which of the following resembles caries in radiographs? 
Select and explain. 
A. Zinc oxide eugenol, B. Zinc phosphate, C. GIC, D. Polymethyl methacnilate
D: Polymethyl methacnilate
Answer: D: Polymethyl methacnilate 
Explanation: None