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
Medial boundary of anatomical snuff box is formed by ? 
Select and explain. 
A. Extensor pollicis longus, B. Extensor pollicis brevis, C. Abductor pollicis longus, D. Flexor carpi ulnaris
A: Extensor pollicis longus
Answer: A: Extensor pollicis longus 
Explanation: Ans. is 'a' i.e., Extensor pollicis longus