Buckminsterfullerene contains the following $X$ number of six-membered and $Y$ number of five-membered rings. What is the value of $X$ and $Y$?

  • A
    $X=10, Y=12$
  • B
    $X=15, Y=15$
  • C
    $X=20, Y=12$
  • D
    $X=10, Y=20$

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