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': 'Inheritance is a major factor in : \nSelect and explain. \nA. Endometrial Ca, B. Cervical Ca, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Endometrial Ca', 'role': 'assistant'}]