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: Orthopaedics
Mallet finger is due to avulsion of extensor tendon of- 
Select and explain. 
A. Proximal phalanx, B. Middle phalanx, C. Distal phalanx, D. Metacarpals
C: Distal phalanx
Answer: C: Distal phalanx 
Explanation: None