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: ENT
Most common cause of acute tonsilitis ? 
Select and explain. 
A. Streptococcus pneumoniae, B. H. Influenza, C. 13- hemolytic streptococci, D. Staphylococcus aureus
C: 13- hemolytic streptococci
Answer: C: 13- hemolytic streptococci 
Explanation: Ans. is 'c' i.e., 13- hemolytic streptococci Tonsils frequently serve as the site of acute infection, which causes acute tonsillitis. Tonsillitis is paicularly common in children, especially in school going age group. However, it can occur in adult also. Virus initiates an acute tonsillitis attack and predisposes to bacterial infection. 8-hemolytic streptococcus is the most common organism causing acute tonsillitis. Other bacteria causing acute tonsillitis are staphylococcus, hemophilus and pneumococcus.