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
Thermoplastisized GP injection technique is indicated for obturation of: 
Select and explain. 
A. Internal resorption., B. Perforation., C. Complex root anatomy., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: Thermo plasticized GP injection technique: 
E.g. OBTURA 3 (cooling to temperature of 71 ºC) (same for OBTURA 2)  
Disadvantage: voids can be seen if vertical compaction not combined. 
Indication: Obturation for 

Internal resorption 
Perforation 
Complex root anatomy (most important) 
Open apex (obturation done with apical barrier).