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: Pharmacology
A patient of abdominal sepsis was started on empirical treatment with intravenous ampicillin and gentamicin. Regarding the treatment of this patient, which statement is most accurate ? 
Select and explain. 
A. Empirical treatment of abdominal sepsis should always include a third generation cephalosporin, B. A drug active against anaerobe should be included in the antibiotic regimen, C. Combination of ampicillin and gentamicin provides good coverage for all likely pathogens, D. If the patient is severely allergic to ampicillin, then ceftriaxone should be used
B: A drug active against anaerobe should be included in the antibiotic regimen
Answer: B: A drug active against anaerobe should be included in the antibiotic regimen 
Explanation: None