Which one of the following orders is not in accordance with the property stated against it?

X – X bond                 F – F     Cl – Cl      Br – Br       I – I
Bond dissociation       38         57              45.5         35.6
energy (kcal/mol)
The lower value of bond dissociation energy of fluorine is due to the high inter-electronic repulsions between non-bonding electrons in the 2p-orbitals of fluorine. As a result F - F bond is weaker in comparison to Cl – Cl and Br – Br bonds.