This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proptosis, Enophthalmos, Developmental Anomalies, Subject name: Ophthalmology
Most common cause of proptosis in adults is - 
Select and explain. 
A. Orbital cellulitis, B. Thyroid Ophthalmopathy, C. Carotico - cavernous fistula, D. Trauma
B: Thyroid Ophthalmopathy
Answer: B: Thyroid Ophthalmopathy 
Explanation: Ans. is 'b' i.e., Thyroid Ophthalmopathy o The most common cause of unilateral proptosis in children is orbital cellulitis.o The most common cause of unilateral proptosis in adults is thyroid ophthalmopathy.