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
In which of the following conditions oral screen should
not be used: 
Select and explain. 
A. Nail biting habit, B. Tongue thrusting, C. Acute infection of tonsils and adenoids, D. Thumb sucking
C: Acute infection of tonsils and adenoids
Answer: C: Acute infection of tonsils and adenoids 
Explanation: Oral screen was first introduced by NEWELL. It works on the principles of both force application and force elimination.