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
Most commonly used approach to brachial Plexus block? 
Select and explain. 
A. Interscalene, B. Supraclavicular, C. Infraclavicular, D. Axillary
B: Supraclavicular
Answer: B: Supraclavicular 
Explanation: Supraclavicular is the most commonly used approach to brachial Plexus block.The supraclavicular approach to the brachial plexus characteristically is associated with a rapid onset of anaesthesia and a high success rate.The supraclavicular approach has more even distribution of local anaesthesia.