This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
The long acting analgesic used in post operative pain is 
Select and explain. 
A. Bupivacane, B. Dubivacine, C. Morphine, D. Tramadol
A: Bupivacane
Answer: A: Bupivacane 
Explanation: .Bupivacaine (Marcaine): It has got prolonged action. It is a vasodilator also. Dose: 3 mg/kg. Epidural block: 0.5% Spinal 0.5% 3 ml.* An epidural catheter is placed in the space and fixed. 2% xylocaine with adrenaline or 0.5% bupivacaine is injected into the space to achieve anaesthesia up to the desired level. ref:SRB&;s manual of surgery,ed 3,pg no 1105