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': 'In Trichomonas -- vaginalis \nSelect and explain. \nA. Greenish discharge, B. White curdy discharge, C. Blood stained discharge, D. Milky discharge', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Greenish discharge', 'role': 'assistant'}]