This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular trauma , 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: (Refer: AK Khurana Comprehensive Ophthalmology, 6th edition, pg no. 403 - 407)The most common cause of unilateral proptosis in children is orbital cellulitisThe most common cause of unilateral proptosis in adults is thyroid ophthalmopathy