This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'The fascia around the nerve bundle of brachial plexus is derived from \nSelect and explain. \nA. Preveebral fascia, B. Deep cervical fascia, C. Clavipectoral fascia, D. Pectoral fascia', 'role': 'user'}, {'content': "Answer: A \nExplanation: The fascia around the brachial plexus is called axillary sheath and is a derivative of preveebral fascia Axillary sheath covers brachial plexus and axillary vessels Axillary sheath localises the anesthetic solution to the nerve plexus. Ref : Gray's Anatomy The Anatomical Basics of Clinical Practice 41 e pg 777", 'role': 'assistant'}]