This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Primary action of superior oblique is 
Select and explain. 
A. Intorsion, B. Depression, C. Adduction, D. Abduction
A: Intorsion
Answer: A: Intorsion 
Explanation: actions of superior oblique: veical axis: depresses main action horizontal axis: abducts anteroposterior axis:rotates medically( intorsion) Ref.BDC volume 3:sixth edition pg 211