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 action of extra-ocular muscle is spared in involvement of Occulomotor nerve - 
Select and explain. 
A. Abduction, B. Depression, C. Elevation, D. Adduction
A: Abduction
Answer: A: Abduction 
Explanation: In third nerve palsy, out of three abductors two are spared, i.e., lateral rectus and superior ablique. Therfore, abduction is best preserved in 3rd nerve palsy.
Some, intorsion & depression is also maintained. But the best answer here is abduction.