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 nerve supply to pronator muscle of distal radioulnar joint is : 
Select and explain. 
A. Median nerve, B. Ulnar nerve, C. Anterior interosseous nerve, D. Posterior interosseous nerve
C: Anterior interosseous nerve
Answer: C: Anterior interosseous nerve 
Explanation: Pronator of proximal radioulnar joint - Pronator teres (median nerve).
Pronator of distal radioulnar joint - Pronator quadratus (anterior interosseous nerve).