This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit and Adnexa, Subject name: Ophthalmology
[{'content': 'Most common metastatic tumor in orbit in adult male is due to \nSelect and explain. \nA. Lung carcinoma, B. Hodgkins lymphoma, C. Neuroblastoma, D. Breast cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lung carcinoma is the most common cause of metastasis to orbit in adult Most common orbital tumor in adults Primary Benign: Cavernous hemangioma Primary Malignant: Lymphoma Metastatic Tumor: Carcinoma Lung (male) , Carcinoma Breast (Female)', 'role': 'assistant'}]