In the network shown in the figure, each of the resistance is equal to $2\,\Omega $. The resistance between the points $A$ and $B$ is .............. $\Omega$
A$1$
B$4$
C$3$
D$2$
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D$2$
d (d) The equivalent circuits are as shown below
Clearly, the circuit is a balanced Wheatstone bridge. So effective resistance between $A$ and $B$ is $2\,\Omega $.
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