This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Orthopaedics
Ulnar nerve paralysis causes 
Select and explain. 
A. Ape thumb deformity, B. Wrist drop, C. Claw finger deformity, D. Meralgia perasthetica
C: Claw finger deformity
Answer: C: Claw finger deformity 
Explanation: Ans. (c) Claw finger deformityRef.: Maheshwari 5th ed. / 64* In ulnar nerve palsy especially in long standing cases, the hand assumes the characteristic "claw" deformity. It is also known as partial claw hand deformity.* Complete claw hand deformity is due to palsy of ulnar and median nerve both.ConditionFeaturesMedian Nerve PalsyLabourer Nerve Palsy* Pointing index* Pen test* Ape thumb deformity* Carpal tunnel syndromeUlnar Nerve PalsyMusician nerve palsy* Book test (froment sign)* Card test* Egawa'stest* Claw finger deformityRadial Nerve PalsyLateral cutaneous nerve of thigh (entrapped)* Wristdrop* Thumb drop* Finger drop* Meralgia paraestheticaErb's palsyPoliceman tip deformity (Porter's tip deformity)