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 lady, 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: If Chlamydia Trachomatis is suspected or diagnosed, both the patient and the paner should be treated. Recommended therapy includes azithromycin 1g orally in a single dose or doxycycline 100mg orally twice daily for 7 days. Ref: Harrison's Principles of Internal Medicine, 15th Edition, Page 1001 ; Current Obs and Gynae Diagnosis and Treatment, 9th Edition, Pages 652-3