With a resistance of ' X ' in the left gap and a resistance of $9 \Omega$ in the right gap of meter bridge, the balance point is obtained at 40 cm from the left end. In what way and to which resistance $3 \Omega$ resistance be connected to obtained the balance at 50 cm from the left end?
- AIn series with $9 \Omega$
- BParallel to $X \Omega$
- CIn series with $X \Omega$
- DParallel to $9 \Omega$
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