which of the following is a derived unit

A derived unit is any unit obtained by combining base SI units like metre (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd) through multiplication or division.

Quick Scoop: What counts as a derived unit?

Common examples of derived units include:

• Newton (N) for force === kg·m/s²
• Joule (J) for work/energy === kg·m²/s²
• Pascal (Pa) for pressure === N/m² === kg/(m·s²)
• Watt (W) for power === J/s === kg·m²/s³
• Hertz (Hz) for frequency === 1/s
• Coulomb (C) for electric charge === A·s
• Volt (V) for potential difference === kg·m²/(s³·A)
• Ohm (Ω) for resistance === kg·m²/(s³·A²)
• Square metre (m²) for area, cubic metre (m³) for volume, metre per second (m/s) for speed.

If your options look like this:

• Unit of mass → kilogram (kg) → base unit
• Unit of time → second (s) → base unit
• Unit of current → ampere (A) → base unit
• Unit of area → square metre (m²) → derived from metre × metre

then the derived unit is unit of area (m²) , because it comes from combining the base unit of length.

In many multiple‑choice questions of this style, “unit of area” (m²) is the expected correct answer to “which of the following is a derived unit?”.

So, if those are the choices, the correct answer is: Unit of area (m²) is a derived unit.