This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Illness Complicating Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Chlamydia in pregnancy, what is the best treatment? \nSelect and explain. \nA. Doxycycline, B. Tetracycline, C. Azithromycin, D. Penicillin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Azithromycin is first-line treatment and has been found to be safe and effective in pregnancy. The fluoroquinolones, erythromycin estolate and doxycycline are avoided in Pregnancy.', 'role': 'assistant'}]