This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Diagnosis, Subject name: Gynaecology & Obstetrics
[{'content': 'The HSG report shows? \nSelect and explain. \nA. Hydro-salpinx, B. Uterus didelphys, C. Adenomyosis, D. Endometriosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Hydrosalpinx', 'role': 'assistant'}]