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: Anatomy
Median nerve injury at the wrist causes- 
Select and explain. 
A. Claw hand, B. Loss of opposition of thumb, C. Policeman's tip deformity, D. Saturday night palsy
B: Loss of opposition of thumb
Answer: B: Loss of opposition of thumb 
Explanation: In median nerve injury at wrist, low median nerve injury is what occurs. That means only the thenar muscles are affected. The features shown in this condition includes- pen test for abductor pollicis brevis paralysis, opposition and abduction of thumb is lost, ape thumb deformity may be shown and loss of sensation of lateral 2/3rd of palm and lateral three and half fingers may be seen.