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: Surgery
Stenosing tenosynovitis of the flexor tendon sheath is also known as: 
Select and explain. 
A. Trigger finger, B. Tennis elbow, C. Carpal tunnel syndrome, D. Dupuytren'scontracture
A: Trigger finger
Answer: A: Trigger finger 
Explanation: Stenosing tenosynovitis of the flexor tendon sheath, also known as trigger finger, is one of the most common upper limb problems to be encountered in hand surgery practice. Ref: Schwaz's principle of surgery 9th edition, chapter 44.