The effective resistance between $A$ and $B$, if resistance of each resistor is $R$, will be

• Correct answer
  A

  $\frac{8 R}{3}$
• B

  $\frac{5 R}{3}$
• C

  $\frac{4 R}{3}$
• D

  $\frac{2}{3} R$

Solution

From symmetry we can remove two middle resistance. New circuit is

Hence, the correct answer is option: 'A'.