This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
Earliest symptom of thyroid opthalmopathy- 
Select and explain. 
A. Proptosis, B. Lid retraction, C. Opthalmoplegia, D. Diplopia
B: Lid retraction
Answer: B: Lid retraction 
Explanation: *The Most common and earliest symptom is upper eyelid retraction. Ref: Head & Neck surgery 2nd/e p.1513