This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': "All of the following may be present in Duane's retraction syndrome except: \nSelect and explain. \nA. Limitation of abduction, B. Narrowing of palpebral apeure in abduction, C. Suppression, D. Head turn", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Narrowing of palpebral apeure in abduction', 'role': 'assistant'}]