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
A patient suffered from bloody diarrhea reported In hospital on laboratory examination lactose positive, Glucose Fermenting, Gram negative rod is isolated, patient infection is most likely due to: 
Select and explain. 
A. Salmonellae enterica, B. E. Coli, C. Shigella Sonnei, D. H. Pylori
B: E. Coli
Answer: B: E. Coli 
Explanation: None