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
Secondary action of Inferior oblique 
Select and explain. 
A. Intortion, B. Extortion, C. Elevation, D. Depression
C: Elevation
Answer: C: Elevation 
Explanation: Inferior oblique
1o - Extortion
2o - Elevation
3o - Abduction.