This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Anesthesia, Subject name: Anaesthesia
[{'content': 'Which block to described as spinal anesthesia of arm:- \nSelect and explain. \nA. Interscalene block, B. Supraclavicular brachial plexus block, C. Infraclavicular block, D. Axillary block', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Supraclavicular block is described as the spinal of the arm as if offers dense anesthesia of the brachial plexus for the surgical procedures at or distal to the elbow. Brachial plexus block Level interscalene approach targets routes supraclavicular targets trunks /division infraclavicular targets cords Procedure Site Interscalene Supraclavicular Infraclavicular Axillary1 Shoulder2 ++ +3 Arm2 + ++ + Elbow2 ++ ++ + Forearm2 + ++ ++ Hand2 + + ++', 'role': 'assistant'}]