This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs in Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Drug of choice for Chlamydia in pregnancy: \nSelect and explain. \nA. Doxycyline, B. Azithromycin, C. Erythromycin, D. Penicillin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Azithromycin is first-line treatment for Chlamydia infection in pregnancy and is safe and effective Chlamydial testing is repeated 3 to 4 weeks after therapy completion and again 3 months after treatment. Azithromycin is the best and the next best option is Amoxicillin (penicillin).', 'role': 'assistant'}]