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': 'Frothy discharge with red ulceration in the vagina is seen with infection of : \nSelect and explain. \nA. Trichomoniasis, B. Moniliasis, C. Chlamydia, D. Bacterial vaginosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trichomoniasis', 'role': 'assistant'}]