What will be the equivalent resistance between the two points $A$ and $D$ ............. $\Omega$
A$10$
B$20$
C$30$
D$40$
AIPMT 1996, Medium
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C$30$
c (c) Resistances at $C$ and $B$ are not in the circuit. Use laws of resistances in series and parallel excluding the two resistance.
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