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The electric field vector through a regi...

The electric field vector through a region is given by`E =D/X^4hati` where, x= length and D = constant. The unit (SI) of D is

A

`Nm^4 C^(-1)`

B

`Nm^3C^(-1)`

C

`Nm^-4C^(-1)`

D

`Vm^(-2)`

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