This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endometriosis and dysmenorrhea, Subject name: Gynaecology & Obstetrics
[{'content': "The condition listed below that would most likely pursue a benign course is \nSelect and explain. \nA. Vaginal adenosis, B. Adenomyosis, C. Extramammary Paget's disease, D. Endometrial hyperplasia", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Adenomyosis is the presence of benign glands and stroma within the myometrium. It is a common cause of diffuse uterine enlargement and menstrual irregularities; however, it is not a precancerous lesion. Ref: Shaw&;s Textbook of Gynaecology; 16th edition; Chapter 30; Endometriosis and Adenomyosis', 'role': 'assistant'}]