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
[{'content': 'A patient presented to you with vaginal discharge. Whiff test was positive. What is the diagnosis? \nSelect and explain. \nA. Bacterial vaginosis, B. Candidal vaginitis, C. Gonococcal infection, D. Chlamydial infection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Whiff positive - Bacterial vaginosis Gram staining - Diplococcus - Gonococci Gram staining - No organism - Chlamydial infection KOH mount - Yeast cells - Candida vaginitis Ref: Essentials of Gynaecology by Lakshmi Seshadri, Edition 1, page - 176.', 'role': 'assistant'}]