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': 'Surest sign of salpingitis is : \nSelect and explain. \nA. Edema of tubes, B. Enlargement of tubes, C. Seropurulent discharge from the fimbria/ pa of the tube, D. Hyperaemic tubes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Seropurulent discharge from the fimbria/ pa of the tube', 'role': 'assistant'}]