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Calculate the resistance of two coils if...

Calculate the resistance of two coils if their equivalent resistance in series and parallel are respectively ` 18 Omega` and `4 Omega`

A

`12 Omega, 6Omega`

B

`15 Omega, 3Omega`

C

`8Omega , 10Omega`

D

`16Omega, 2Omega`

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