This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional anaesthesia, Subject name: Anaesthesia
For reduction of shoulder one of the following technique is appropriate 
Select and explain. 
A. Spinal anesthesia, B. Interscalene block, C. Axillary brachial block, D. Bier block
B: Interscalene block
Answer: B: Interscalene block 
Explanation: Interscalene approach: most intense at C5-C7 dermatomes and least intense at C8-T1(ulnar nerve area), most optimal for procedures on shoulderAxillary approach: most optimal for a procedure from elbow to hand