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: Medicine
Common organism causing liver abscess in biliry sepsis is: 
Select and explain. 
A. Enterococci, B. Bacteroids, C. Staphylococcus, D. Klebsiella
A: Enterococci
Answer: A: Enterococci 
Explanation: Source of infection MC organism 1.Biliary Enteric gram negative organisms (enterococci) 2.Other intraperitoneal source Mixed aerobic/anaerobic organisms (e.g. B. fragilis) 3.Haematogenous seeding Staphylococcus, Streptococcus 4.Immunocompromised Candida species 5.Parasitic Ascaris lumbricoides Ref: Heneghan et al. BMC Research Notes 2011, 4:80.