The figure shows a tetrahedron, each side of which has a resistance $r$ If a battery is connected between any two points of the tetrahedron, then identify the correct statement $(s)$.
  • A
    The potentials of the other two points are always equal.
  • B
    There always exists a branch through which no current flows.
  • C
    The current coming out of the battery in each case is same.
  • D
    All of the above
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