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The incorrect statement regarding to 17 ...

The incorrect statement regarding to 17 th group elements is
(A) Bond dissociation enthalpy: ` Cl_(2)`>`Br_(2)`>`F_(2)`>`I_(2)`
(B) Electron gain enthalpy: `Cl>F>Br>I`
(C) In deposits of dried up seas chlorine is present as carnallite
(D) In Chile salt petre iodine is present as sodium iodide

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