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
[{'content': 'Most common ocular movement affected in thyroid ophthalmopathy- \nSelect and explain. \nA. Adduction, B. Abduction, C. Elevation, D. Depression', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Unilateral elevator palsy caused by an involvement of the inferior rectus muscle followed by failure of abduction due to involvement of medial rectus muscle. Ref .ak khurana 6th edition pg no 414', 'role': 'assistant'}]