What unit of measurement is represented by Mcg.?

The unit of measurement represented by Mcg is microgram. This is a metric unit used to measure small quantities, particularly in the fields of medicine and pharmacology, where precise dosages are critical. One microgram is one-millionth of a gram, making it commonly used when dealing with potent drugs or substances where even tiny amounts can have significant effects on health.

In contrast, the other options represent different measurements: milligram (millions of a gram) is larger than microgram; milliliter (a unit of volume) measures liquid, not weight; and megagram (also called metric ton) is much larger, equating to a thousand grams. Understanding these distinctions helps when interpreting medication dosages and ensuring accuracy in medical settings.