Q10. The effective resistance between $A$ and $B$, if resistance of each resistor is $R$, will be\\
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(1) $\frac { 8 R } { 3 }$\\
(2) $\frac { 5 R } { 3 }$\\
(3) $\frac { 4 R } { 3 }$\\
(4) $\frac { 2 } { 3 } R$