Units of electric flux are

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(C) Electric flux $(\Phi_E)$ is defined as the product of the electric field $(E)$ and the area $(A)$ through which it passes,i.e.,$\Phi_E = E \cdot A

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$N \cdot m^2 / C$

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(C) Electric flux $(\Phi_E)$ is defined as the product of the electric field $(E)$ and the area $(A)$ through which it passes,i.e.,$\Phi_E = E \cdot A$.
Method $1$: Using the relation between electric field and potential,$E = -dV/dx$. The unit of electric field is $V/m$. Therefore,the unit of flux is $(V/m) \cdot m^2 = V \cdot m$.
Method $2$: Using the definition $E = F/q$. The unit of electric field is $N/C$. Therefore,the unit of flux is $(N/C) \cdot m^2 = N \cdot m^2 / C$.
Both $V \cdot m$ and $N \cdot m^2 / C$ are valid units for electric flux. However,given the options,$V \cdot m$ is a standard representation.

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