This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Intermittent proptosis is a sign of: 
Select and explain. 
A. Pseudotumour, B. Carotico-cavernous fistula, C. Capillary haemangioma, D. Orbital varices
D: Orbital varices
Answer: D: Orbital varices 
Explanation: Ans. Orbital varices