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': 'Best prognosis in reversibility occurs in : \nSelect and explain. \nA. lsthmo - Isthmic type, B. lsthmo - ampullary type, C. Ampullary - foreacial type, D. Ampullary fimbrial type', 'role': 'user'}, {'content': 'Answer: A \nExplanation: lsthmo - Isthmic type', 'role': 'assistant'}]