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: Dental
The largest component of gutta percha cones is 
Select and explain. 
A. Gutta percha, B. Zinc oxide, C. Resins and waxes, D. Colouring agents
B: Zinc oxide
Answer: B: Zinc oxide 
Explanation: None