SI units — practice question

Which SI unit, when expressed in base units, is incorrect?

• Aunit of force, $\text{kg m s}^{-2}$
• Bunit of momentum, $\text{kg m s}^{-1}$
• Cunit of pressure, $\text{kg m}^{-2} \text{s}^{-2}$
• Dunit of work, $\text{kg m}^2 \text{s}^{-2}$