To determine the answer, we write the measurements to its base unit which would be grams. It is written as follows:
A. 250 g
B. 0.25 hg = 25 g
C. 2500 dg = 250 g
D. 2.5 kg = 2500 g
Therefore, the correct answer is option B, 0.25 hg contains the smallest amount of matter.
