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
Muscle causing supination of forearm ? 
Select and explain. 
A. Biceps brachii, B. Brachioradialis, C. FDS, D. Anconeus
A: Biceps brachii
Answer: A: Biceps brachii 
Explanation: Ans. is 'a' i.e., Biceps brachii Movement Muscles causing movementPronation Pronator quadratus (strong pronator), Pronator teres (Rapid pronator).Supination Supinator (when elbow is extended), Biceps (when elbow is flexed