Answer:
0.125 mg
Step-by-step explanation:
The correct answer would be 0.125 mg
According to the conversion factor, one milligram of a sample is equivalent to one thousand micrograms of the same sample.
milligram =

microgram =

Hence,
1 milligram = 1000 micrograms or 1 microgram =
milligram
Therefore, 125 micrograms will be:
125/1000 = 0.125 milligram