Final answer:
4 grams is equal to 4,000,000 micrograms, which means the correct answer is not among the given options. The conversion is based on the fact that one gram equals 1,000,000 micrograms.
Step-by-step explanation:
To convert grams to micrograms, you need to understand the relationship between these two units of measure. Since one gram is equal to 1,000,000 micrograms (1 gram = 1,000,000 µg), to find out how many micrograms are in 4 grams, you multiply 4 by 1,000,000.
Therefore, the calculation is as follows:
4 grams = 4 x 1,000,000 µg = 4,000,000 µg.
Thus, 4 grams is equal to 4,000,000 micrograms. The correct answer to the question is not listed among the options a), b), c), or d). All those options understate the actual amount, as 4 grams equals 4,000,000 µg, not 4,000 µg, 400 µg, 40,000 µg, or 4 µg.