This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral nerve injuries, Subject name: Orthopaedics
Median nerve lesion at the wrist causes all of the following except - 
Select and explain. 
A. Thenar atrophy, B. Weakness of Adductor pollicis, C. Weakness of 1st and 2nd lumbricals, D. Weakness of Flexor pollicis Brevis
B: Weakness of Adductor pollicis
Answer: B: Weakness of Adductor pollicis 
Explanation: Supply of median nerve in hand * motor- flexor pollicis brevis, opponens pollicis , abductor pollicis brevis , first & second lumbricals Sensory - palmar skin over the lateral three & a half digits with their nail bed. Adductor pollicis muscle - supply deep branch of ulnar nerve , this muscle adducts the thumb. *it can tested by using Froment sign or book test In addition to it ulnar nerve supply in hand. * motor - abductor digiti minimi , flexor digiti minimize , opponens digiti minimi , adductor pollicis , all interossei & medial 2 lumbricals. REF:Essential ohopedics, Maheshwari, 9th edition ,pg.no. 68