This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
All are methods of regional anaesthesia Except 
Select and explain. 
A. Topical anaesthesia, B. Bier's block, C. Nerve block, D. Total intravenous anaesthesia
D: Total intravenous anaesthesia
Answer: D: Total intravenous anaesthesia 
Explanation: Regional anaesthesia (Local anaesthesia)Regional anaesthesia means loss of sensation in body pa without the loss of consciousness or the impairment of central control of vital functionMethods are:Topical anaesthesia (surface anesthesia)Infiltration anaesthesiaIntravenous regional anaesthesia (Bier's block)Conduction block (either field block or nerve block)Spinal anaesthesiaEpidural anaesthesia(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition, pg no. 1076)