Regarding electronegativity

i) The element with maximum electronegativity : Fluorine

ii) In Pauling scale, the reference element is : Hydrogen

iii)Elements with stable configuration have high electronegativity

We know that Fluorine has tremendous capacity to attract a shared pair of electrons,that is why it has maximum electronegativity.

Hence, Statement(i) is correct.

Statement(ii) is also correct because Hydrogen can form covalent bonds with a large variety of elements that is why In Pauling scale, the reference element is: Hydrogen.

Now, We also know that elements  with stable configuration do not gain electrons, that is why they do not possess high electronegativity.

Hence, Statement(iii) is incorrect.
Therefore, option(B) is the correct answer.