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One milligram is equivalent to which of the following?

  1. 1/10 of a gram

  2. 1/100 of a gram

  3. 1/1000 of a gram

  4. 1/10000 of a gram

The correct answer is: 1/10 of a gram

One milligram is equivalent to 1/1000 of a gram. This is based on the metric system, where the prefix "milli-" denotes a factor of one thousandth. Therefore, since there are 1000 milligrams in one gram, it follows that one milligram is indeed 1/1000 of a gram. The other options reflect incorrect conversions based on how the metric prefixes work. Understanding these conversions is essential in various fields, such as chemistry and medicine, where precise measurements are crucial.