This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
The concentration of adrenaline used with lignocaine? 
Select and explain. 
A. 1.430555556, B. 1:10,000, C. 1:20,000, D. 1:2,00,000
D: 1:2,00,000
Answer: D: 1:2,00,000 
Explanation: 1 in 1 lakh to 2 lakh pas (5mcg/ml) is the mixing of adrenaline with lignocaine in local anesthesia. In dental procedures: 1: 50000 to 1lakh.Ref: KK Sharma 3rd ed. Pg: 222.