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
Which of the following is a feature of unilateral oculomotor nerve palsy? 
Select and explain. 
A. Drooping of eyelid, B. Accommodation reflex is absent, C. Visual loss, D. Pupillary light reflex is completely absent
A: Drooping of eyelid
Answer: A: Drooping of eyelid 
Explanation: Oculomotor nerve innervates levator palpebrae superioris, complete lesion of this nerve produces closure of affected eye due to paralysis of this muscle. Oculomotor nerve innervates all the extraocular muscles of the eye except lateral rectus and superior oblique. Oculomotor nerve lesion result in lateral detion of the eye due to unopposed action of lateral rectus. Patients develop diplopia in all directions of gaze except for lateral gaze towards the side of involvement. Pupillary function may be normal or impaired. Ref: Greenberg D.A., Aminoff M.J., Simon R.P. (2012). Chapter 7. Neuro-Ophthalmic Disorders. In D.A. Greenberg, M.J. Aminoff, R.P. Simon (Eds),Clinical Neurology, 8e.