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
Which of the following is impoant feature of Duane retraction syndrome 
Select and explain. 
A. Hyperopia, B. Retraction of globe, C. Head tilt, D. All of the above
B: Retraction of globe
Answer: B: Retraction of globe 
Explanation: 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