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
Which of the following most commonly causes intraorbital metastasis in female? 
Select and explain. 
A. Breast cancer, B. Cervical cancer, C. Ovarian cancer, D. Endometrial cancer
A: Breast cancer
Answer: A: Breast cancer 
Explanation: 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.