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
Glass reinforced composite is used in all of the following except ? 
Select and explain. 
A. Obturation of young permanent teeth, B. Splinting of teeth, C. Space maintainer, D. Used in intra-post cementation of endodontically treated tooth
A: Obturation of young permanent teeth
Answer: A: Obturation of young permanent teeth 
Explanation: None