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
Most common metastatic tumor in orbit in adult male is due to 
Select and explain. 
A. Lung carcinoma, B. Hodgkins lymphoma, C. Neuroblastoma, D. Breast cancer
A: Lung carcinoma
Answer: A: Lung carcinoma 
Explanation: 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)