The equivalent resistance and potential difference between $A$ and $B$ for the circuit shown are respectively:

  • A
    $4 \,\Omega, 8\, V$
  • B
    $8 \,\Omega, 4\, V$
  • C
    $2 \,\Omega, 2\, V$
  • D
    $16 \,\Omega, 8\, V$

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