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': 'Mechanism responsible for high rates of spontaneous abortion in septate uterus is \nSelect and explain. \nA. Distorted uterine cavity, B. Associated cervical abnormality, C. Implantation on avascular septum, D. Unfavourable endometrial lining', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The primary mechanism responsible for spontaneous abortion in septate uterus is partial or complete implantation on avascular septum.', 'role': 'assistant'}]