Which of the following has been arranged in order of the increasing stability of the 2 oxidation state of the ions?

(a) Na⁺ < Mg²⁺ < Al³⁺ < Si⁴⁺ < P⁵⁺
(b) P⁵⁺ < Si⁴⁺ < Al³⁺ < Mg²⁺ < Na⁺
(c) Al³⁺ < Si⁴⁺ < Mg²⁺ < Na⁺ < P⁵⁺
(d) Mg²⁺ < Na⁺ < Al³⁺ < Si⁴⁺ < P⁵⁺