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
Scarlet fever is caused by? 
Select and explain. 
A. Streptococci, B. Staphylococci, C. Klebsiella, D. Proteus
A: Streptococci
Answer: A: Streptococci 
Explanation: None