Four resistors A,B,C and D from a wheats...

Four resistors A,B,C and D from a wheatstone's bridge. The bridge is balanced when `C=100Omega`, if A and b are inter changed, the bridge balances for `C=121Omega`. The value of D is

`10Omega`

`100Omega`

`110Omega`

`120Omega`

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The correct Answer is:

using wheatstone bridge principle

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