This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around Shoulder, Subject name: Orthopaedics
[{'content': "Injury to cervical nerve C5, C6 causes: \nSelect and explain. \nA. Erb's paralysis, B. Klumpke paralysis, C. Horner syndrome, D. Central cord syndrome", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) Erb's paralysisRef: Apley's orthopedics 9th ed./ 279-80Erb's paralysis- Erb's palsy or Erb-Duchenne palsy is a paralysis of the arm caused by injury to the upper group of the arm's main nerves, specifically the severing of the upper trunk C5-C6 nerves.Position of hand in Erb's paralysis: Adducted, Internally rotated, and pronatedKlumpke's paralysisKlumpke's Palsy involves the eighth cervical vertebra and the first thoracic vertebra (C8 and Tl).Position of hand: Elbow flexed, arm supinatedThere may be unilateral homer syndromeHorner syndromeSeen with Pancoast tumor and presents with Ptosis, Miosis, enopthalmos, anhydrosis, loss of ciliospinal reflex.Central cord syndromeSeen most often after a hyperextension injury in an individual with long-standing cervical spondylosis. It presents with features of cortico-spinal pathway.", 'role': 'assistant'}]