This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Squint, Subject name: Ophthalmology
[{'content': 'Which of the following is impoant feature of Duane retraction syndrome \nSelect and explain. \nA. Hyperopia, B. Retraction of globe, C. Head tilt, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Retraction of globe is essential feature of Duane retracation syndrome Duane Retraction Syndrome Duane retraction syndrome is a misinnervation syndrome of cranial nerve 3 and cranial nerve 6. D/d is sixth nerve palsy but note there is no retraction in sixth nerve palsy. Types DRS type 1: Abduction is limited DRS type 2: Adduction limited DRS type 3: both abduction and adduction is limited', 'role': 'assistant'}]