Four wires $AB,\,\,BC,\,\,CD,\,\,DA$ of resistance $4\, \Omega$ each and a fifth wire $BD$ of resistance $8\, \Omega$ are joined to form a rectangle $ABCD$ of which $BD$ is a diagonal. The effective resistance between the points $A$ and $B$ is
  • A$24\, ohm$
  • B$16\, ohm$
  • C$\frac{4}{3}\,ohm$
  • D$\frac{8}{3}\,ohm$
Medium
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