Percentage of adrenaline with lignocaine for local infilteration is?

Percentage of adrenaline with lignocaine
for local infilteration is?
a) 1:1000
b) 1:10000
c) 1:100
d) 1:50000
Correct Answer - D
Ans. is ‘d’ i.e., 1:50000
The most common concentrations of epinephrine combined with
local anaesthetics are 1:50,000 (0.02 mg/ml), 1:100,000 (0.01
mg/ml) and :200000 (0.005 mg/ml).
The 1:50000 concentration is manufactured in combination with 2%
lidocaine.
The 1:100,000 concentration is manufactured in combination with
2% lidocaine and 4% articaine.
The 1:200,000 concentration is manufacture in combination with 4%
prilocaine, 4% articaine and 0.5% bupivacaine