What are the enthalpies of $\sigma$-bond and $\pi$-bonds in an alkene?

  • A
    $397 \ kJ \ mol^{-1}$ and $284 \ kJ \ mol^{-1}$
  • B
    $284 \ kJ \ mol^{-1}$ and $397 \ kJ \ mol^{-1}$
  • C
    $450 \ kJ \ mol^{-1}$ and $300 \ kJ \ mol^{-1}$
  • D
    $300 \ kJ \ mol^{-1}$ and $450 \ kJ \ mol^{-1}$

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