This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexually Transmitted Disease in the Female, Subject name: Gynaecology & Obstetrics
[{'content': 'M/c cause of vaginal discharge among reproductive age females \nSelect and explain. \nA. Trichomonas, B. Candida, C. Bacterial vaginosis, D. Gonorrhea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c, i.e. Bacterial vaginosisRef: William Gynae 3rd/ed, p51"Bacterial vaginosis is the most common cause of vaginal discharge among reproductive age women." - Ref: Williams Gynae 3rd/ed, p51.', 'role': 'assistant'}]