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': 'Intersitial myomas predispose to menorrhagia by: \nSelect and explain. \nA. Inhibiting uterine contractility, B. Degeneration, C. Erosion of endometrial mucosa, D. Mechanism not known', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Inhibiting uterine contractility', 'role': 'assistant'}]