This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerves of Upper Extremity, Subject name: Anatomy
[{'content': "Klumpke's paralysis involves ? \nSelect and explain. \nA. C5 C6, B. C6 C7, C. C7T1, D. C8T1", 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) C8 T1REF: BDC 4th edition vol 1 Page 53KLUMPKE'S PARALYSIS:Site of injury: lower trunk of brachial plexusCause of injury: undue abduction of the armsNerve roots involved: mainly T1 partly C8Muscles paralyzed:Intrinsic muscles of the hand (Tl)Ulnar flexors of wrist and fingers (C8)Disability:Claw handHorner's syndromeVasomotor changesTrophic changesCutaneous anesthesia on the ulnar border of hand and forearm", 'role': 'assistant'}]