This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve supply, Nerve Lesions, Subject name: Anatomy
A lesion involving C8 nerve root will affect: 
Select and explain. 
A. Extensors of wrist and fingers, B. Flexors of wrist and fingers, C. Small muscles of hand, D. Supinators
B: Flexors of wrist and fingers
Answer: B: Flexors of wrist and fingers 
Explanation: C8 nerve root supplies -1. Wrist (and Finger) flexors and2. Small muscles of hand Note: Small muscles of hand are supplied by C8; T1, More precisely T1. Supinators - C6 Wrist (and Finger) extensors--C6(7) Wrist (and Finger) flexors--C7(8) Intrinsic muscles of hand--C8; T1