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': 'Diagnosis of bacterial vaginosis by microscopy of vaginal discharge is suppoed by all of the following, EXCEPT: \nSelect and explain. \nA. Absence of lactobacilli, B. Presence of clue cells, C. Abundance of polymorphs, D. Abundance of gram positive coccobacilli', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Microscopy in bacterial vaginosis shows: Clue cells in wet mount Decreased number of lactobacilli Increased number of gardnerella vaginalis POLYMORHS ARE CONSPICUOUSLY ABSENT Ref: GYNECOLOGICAL DIAGNOSIS Shaw 15 th edition page: 131-132.', 'role': 'assistant'}]