Answer:
0.12 mL of the epinephrine solution.
Step-by-step explanation:
We have:
A bottle of epinephrine labeled 1 mg in 1 mL of solution,
We need to prepare:
An injection of 0.12 mg of epinephrine
Hence:

Therefore, to prepare an injection of 0.12 mg of epinephrine labeled 1 mg in 1 mL we need to inject 0.12 mL of the epinephrine solution.
I hope it helps you!