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
Concentration of adrenaline used with lidocaine is? 
Select and explain. 
A. 0.180555556, B. 1.430555556, C. 1:20000, D. 1:200000
D: 1:200000
Answer: D: 1:200000 
Explanation: (334) 1 in 200000 REF: Miller 6th ed p. 589 USES AND DOSES OF ADRENALINE: USE DOSE Anaphylaxis SC or IM injection is 0.3-0.5 mg 1:1,000 Croup Racemic adrenaline is a 1:1 mixture of the dextrototary (d) and levorotatory (1) isomers of adrenaline Local anesthetics 1 in 200000