What is the distance between two consecutive base pairs in a $DNA$ double helix?

  • A
    $3.4 \times 10^{-9} \ m$
  • B
    $0.34 \times 10^{-9} \ m$
  • C
    $3.4 \times 10^{10} \ m$
  • D
    $0.34 \times 10^{10} \ m$

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