This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Which of the following tumor most commonly presents with bilateral proptosis? 
Select and explain. 
A. Leukemia, B. Adenocarcinoma, C. Fibrous his ocytoma, D. Cavernous hemangioma
A: Leukemia
Answer: A: Leukemia 
Explanation: .