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
Most common organism implicated in the etiology of urinary tract infection in the community is ? 
Select and explain. 
A. E. coli, B. Proteus, C. Pseudomonas, D. Streptococci
A: E. coli
Answer: A: E. coli 
Explanation: None