The effective resistance of two resistors in parallel is $\frac{{12}}{7}\,\Omega $. If one of the resistors is disconnected the resistance becomes $4$ $\Omega$. The resistance of the other resistor is.............. $\Omega$
  • A$4 $
  • B$3$
  • C$\frac{{12}}{7}$
  • D$\frac{7}{{12}}$
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