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
The action of the anconeus muscle is - 
Select and explain. 
A. Screwing movements, B. Elbow flexion, C. Forearm supination, D. Adduction
A: Screwing movements
Answer: A: Screwing movements 
Explanation: Action of Anconeus
-        Helps triceps in extension of elbow joint.
-        Resists abduction of ulna on pronation of forearm.
-        Screwing movement
-        Elbow joint capsule tensor.