This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Which of the following is false with regards to bupivacaine 
Select and explain. 
A. Bupivacaine concentration for epidural anaesthesia is 0.5%, B. Bupivacaine concentration for spinal anaesthesia is 0.5%, C. Bupivacaine is used frequently for i.v regional anaesthesia, D. Bupivacaine is most potent local anaesthetic
C: Bupivacaine is used frequently for i.v regional anaesthesia
Answer: C: Bupivacaine is used frequently for i.v regional anaesthesia 
Explanation: Bupivacaine is contraindicated in Bier’s block or IVRA.