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
Structure present in anatomical snuff box: 
Select and explain. 
A. Ulnar artery, B. Radial Artery, C. Median nerve, D. Radial nerve
B: Radial Artery
Answer: B: Radial Artery 
Explanation: • Anatomical snuff box is a depression which appears on the lateral aspect of wrist and becomes prominent when thumb is extended.
• BOUNDARIES-
■ Anteriolateral Radial- abductor pollicis longus and extensor pollicis brevis
■ Postero-medial ulnar - extensor pollicis longus
■ Floor- scaphoid and trapezium
■ Roof- subcutaneous tissue and skin.