This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumors, Subject name: Ophthalmology
Most common malignant intraorbital tumor in adult is - 
Select and explain. 
A. Lymphoma, B. Rhabdomyosarcoma, C. Dermoid cyst, D. Sarcoma
A: Lymphoma
Answer: A: Lymphoma 
Explanation: Malignant adult tumors are most commonly lymphoma, squamous cell carcinoma, and metastatic disease. Less commonly, thetumor is an adenoid cystic carcinoma of the lacrimal gland, which is an aggressive tumor. Lymphomas involving the orbit are typically B-cell and characteristically low grade Ref khurana 6/e