<prompt> Which of the following is false with regards to bupivacaineBupivacaine concentration for epidural anaesthesia is 0.5Bupivacaine concentration for spinal anaesthesia is 0.5Bupivacaine is used frequently for i.v regional anaesthesiaBupivacaine is most potent local anaesthetic  <response>: Bupivacaine is contraindicated in Biers block or IVRA. 