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
[{'content': 'Drug which is safe in pregnancy? \nSelect and explain. \nA. Flouroquinolone, B. Sulfadiazine, C. Tetracycline, D. Penicillin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: CHOICE OF DRUGS FOR COMMON PROBLEMS DURING PREGNANCY', 'role': 'assistant'}]