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
[{'content': 'Which of the following tumor most commonly presents with bilateral proptosis? \nSelect and explain. \nA. Leukemia, B. Adenocarcinoma, C. Fibrous his ocytoma, D. Cavernous hemangioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]