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: Surgery
A 11 year old boy with grossly carious right maxillary lateral incisor, LA is given, complains of burning sensation in right eye, swelling in right eyelid, best statement to explain this condition. 
Select and explain. 
A. Middle meningeal artery has tortuous course, B. LA reaches the eyelid via infraorbital foramen, C. Reaction is due to preservative in the L.A., it will subside in some time, D. Pain will subside in few minutes
C: Reaction is due to preservative in the L.A., it will subside in some time
Answer: C: Reaction is due to preservative in the L.A., it will subside in some time 
Explanation: None