Question

Which of the following is not an unit of measurement of mass?

• A. kilogram
• B. ounce
• C. millilitre
• D. pound

Answer 1

The correct option is C millilitre

SI unit of mass is kilogram (kg).
Other commonly used units of mass are gram (g), milligram (mg), pound, ounce, etc.

The SI unit of volume is metre cube $\left(m^3\right)$.
Other commonly used units of volume are litre (L), millilitre (mL), etc.

Hence, millilitre (ml) is an unit of measurement of volume, and not that of mass.