In a Wheatstone's network, P=2Omega, Q=2...

In a Wheatstone's network, `P=2Omega, Q=2Omega, R=2Omega and S=3Omega`. The resistance with which S is to be shunted in order that the bridge may be balanced is

`4Omega`

`1Omega`

`6Omega`

`2Omega`

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