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
Ideal root canal filling for primary teeth 
Select and explain. 
A. Calcium hydroxide-iodine mixture, B. Zinc oxide-eugenol, C. Gutta percha, D. Ferric sulphate
A: Calcium hydroxide-iodine mixture
Answer: A: Calcium hydroxide-iodine mixture 
Explanation: None