This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
Muscle that can extend the middle distal phalanx of the index finger include all except 
Select and explain. 
A. The first dorsal inter interosseous, B. The first lumbrical, C. The second palmar interosseous, D. Extensor carpi radialis longus
D: Extensor carpi radialis longus
Answer: D: Extensor carpi radialis longus 
Explanation: Extensor carpi radialis Origin: lower 1/3 rd of lateral supracondylar ridge of humerus Inseion: posterior surface of base of second metacarpal bone. Action: extends and abducts hand at the wrist joint.