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': 'Leiomyomatosis is \nSelect and explain. \nA. Malignant tumor, B. Non-infiltrative tumor, C. Extra uterine tumor, D. uterine fibroid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Extra-uterine smooth - muscle tumors, Which are benign yet infiltrative, may develop in women with concurrent or prior uterine leiomyoma\xa0⇒ Leiomyomatosis.', 'role': 'assistant'}]