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
Drug of choice for Chlamydia in pregnancy: 
Select and explain. 
A. Doxycyline, B. Azithromycin, C. Erythromycin, D. Penicillin
B: Azithromycin
Answer: B: Azithromycin 
Explanation: 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).