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 female patient presents with reddish vagina and greenish discharge, the probable diagnosis is : \nSelect and explain. \nA. Herpes infection, B. Trichomonas vagination, C. Gonococcal infection, D. Candidiasis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Trichomonas vagination', 'role': 'assistant'}]