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
Impetigo contagiosa is caused by - 
Select and explain. 
A. Group A beta hemolytic streptococci, B. Staphylococcus, C. H.influenzae, D. Pseudomonas
A: Group A beta hemolytic streptococci
Answer: A: Group A beta hemolytic streptococci 
Explanation: Ans. is 'a' i.e., Group A beta hemolytic streptococci