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
True about peripheral nerve injury in upper limb-a) Radial nerve injury cause anaesthesia over anatomical snuff boxb) Median nerve injury cause wrist dropc) Ulnar nerve injury cause claw handd) Index finger anesthesia is caused by median nerve injurye) Thumb anaesthesia is caused by ulnar nerve injury 
Select and explain. 
A. abc, B. ad, C. acd, D. bde
C: acd
Answer: C: acd 
Explanation: Radial nerve injury causes wrist drop. Thumb anaesthesia is due to median nerve injury.