If the capacity of a spherical conductor is $1 \text{ picofarad}$,then its diameter would be

  • A
    $1.8 \times 10^{-3} \text{ m}$
  • B
    $18 \times 10^{-3} \text{ m}$
  • C
    $1.8 \times 10^{-5} \text{ m}$
  • D
    $18 \times 10^{-7} \text{ m}$

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