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: Gynaecology & Obstetrics
A 25 year old patient, Bindu. presents with vaginal discharge. Examination of the discharge reveals the presence of Chlamydial infection. The treatment of choice is : 
Select and explain. 
A. Azithromycin + contact tracing, B. Doxycycline + Metronidazole, C. Fluconazole + Doxycycline, D. Metronidazole
A: Azithromycin + contact tracing
Answer: A: Azithromycin + contact tracing 
Explanation: Azithromycin + contact tracing