Which of the following properties does not depend on periodicity?

Which of the following statements is incorrect?

Choose the correct statement.

Assertion : Best diagonal relationship is shown between $Be$ and $Al$.
Reason : Ionization energy of $Be$ is almost the same as that of $Al$.

Observe the following statements:
$I$. The physical and chemical properties of elements are periodic functions of their electronic configuration.
$II$. Electronegativity of fluorine is less than the electronegativity of chlorine.
$III$. Electropositive nature decreases from top to bottom in a group.
The correct answer is:

In which of the following options does the order of arrangement not agree with the variation of property indicated against it?