This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
73 yrs old Ramlal has intra-abdominal sepsis. The causative organism was found to be vancomycin, gentamycin and ampicillin resistant. It grows well in presence of 6.5% NaCl and arginine. Bile esculin hydrolysis is positive. Which of the following is this organism 
Select and explain. 
A. Streptococcus agalactae, B. Enterococcus fecalis, C. Streptococcus bovis, D. Streptococcus pneumonia
B: Enterococcus fecalis
Answer: B: Enterococcus fecalis 
Explanation: Option 1, 3, 4 Bile esculin hydrolysis test: Negative: Streptococcus agalactiae, Streptococcus pneumonia Positive: Streptococcus bovis but it does not grow in presence of 6.5% NaCl, pH 9.6 Option 2 Enterococcus fecalis Grow in the presence of bile and hydrolyze esculine - bile esculin positive. Grows in presence of 6.5% NaCl, pH 9.6 which differentiate it from Group D streptococci. Resistant to penicillins, aminoglycosides and sulfonamides. Intrinsic resistance to cephalosporins and cotrimoxazole. Vancomycin resistance is also seen