This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Ophthalmology
The most common cause of proptosis in adults:- 
Select and explain. 
A. Orbital cellulitis, B. Preseptal cellulitis, C. Thyroid eye disease, D. Capillary hemangioma
C: Thyroid eye disease
Answer: C: Thyroid eye disease 
Explanation: Most common cause of unilateral proptosis in children is orbital cellulitis and in adults is thyroid ophthalmopathy. Most common cause of bilateral proptosis in children is neuroblastoma and leukemia (chloroma) and in adults is thyroid ophthalmopathy.