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: Anatomy
Action of anconeus ? 
Select and explain. 
A. Mild pronation, B. Flexion, C. Supination, D. Extention
D: Extention
Answer: D: Extention 
Explanation: Ans. is 'd' i.e., Extention