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
Injury to the ulnar nerve in the elbow results in 
Select and explain. 
A. Total claw hand, B. Paralysis of all interossei, C. Complete paralysis of flexor digitorum profundus, D. Paralysis of all lumbricals
B: Paralysis of all interossei
Answer: B: Paralysis of all interossei 
Explanation: All interossei - Dorsal and Palmar are supplied by ulnar nerve. Dorsal interossei have the function of Abduction Palmar interossei have the function of Adduction. Ref : Gray's Anatomy The Anatomical Basics of Clinical Practice 41 e pg 784.