Q: One hundred (100) micrograms equals I. 100,000 nanograms II. 0.1 milligrams III. 0.001 grams
Explanation: 1 mg 1g_ 100 mcg x 1000 mcg x 1000 mg - 0.0001 g In this example, consider one microgram as equaling 1000 nanograms; thus, 100 mcg = 100,000 ng. Since 1 milligram equals 1000 mcg, 100 mcg equals 0.1 mg. If 1 mg equals .001 gram, 0.1 mg or 100 mcg equals 0.0001 g. It may be clearer if one solves this conversion using di- mensional analysis.