This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical & Surgical Illness Complication Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following most commonly causes intraorbital metastasis in female? \nSelect and explain. \nA. Breast cancer, B. Cervical cancer, C. Ovarian cancer, D. Endometrial cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a, i.e. Breast cancerRef: Journal of head and neck oncology 2011Orbital metastasis occurs in 2to3% of cancers. Metastasis of breast cancer accounts for majority of ocular and orbital metastasis.', 'role': 'assistant'}]