Which of the following is not a unit of electric field intensity?

The correct answer is Option (4) → $V m$

Electric field intensity $E$ is defined as force per unit charge:

$E = \frac{F}{q}$

Units:

- $N/C = \text{Newton per Coulomb}$

- $V/m = \text{Volt per meter}$

- $V m = \text{Volt meter}$ → This is not a unit of electric field intensity

- $N A^{-1} s^{-1}$ can be converted to $N/C$, so it is valid