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: Microbiology
Common inhabitant of throat and tonsils is 
Select and explain. 
A. Alpha hemolytic streptococci (S. viridans), B. Staphylococci, C. Beta hemolytic streptococci, D. Pneumococci
A: Alpha hemolytic streptococci (S. viridans)
Answer: A: Alpha hemolytic streptococci (S. viridans) 
Explanation: None