This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'Which of the following drug is safe during pregnancy is: \nSelect and explain. \nA. Aminoglycosides, B. Ampicilline, C. Chloramphenicol, D. Cotrimoxazole', 'role': 'user'}, {'content': "Answer: B \nExplanation: (Ampicilline): Ref 37-H (700-KDT 6th) Intrauterine amniotic infection is most often caused by E. coli and group B streptococcus. In high risk patients at term or in proterm patients routine intrapartum prophylaxis of group B streptococcus (GBS) disease is recommended Penicillin G and Ampicillin are the drug of choice. Given at 1 hour before surgery Initially it was given with induction of anesthesia.But as per new protocol it is given 1 hour before surgery.For prolonged surgery it's repeated after 4 hours", 'role': 'assistant'}]