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
Concentration of adrenaline used with local anaesthetic 
Select and explain. 
A. 1:1,000, B. 1:10,000, C. 1:1,00000, D. 1:2,00000
D: 1:2,00000
Answer: D: 1:2,00000 
Explanation: Concentration of adrenaline used for local anaesthetic is 1 in 2 lakhs, (that of phenylephrine is 1 in 20,000).