Question

Which of the following arrangements is in order of increasing size?
1) Ga3+ > Ca²⁺ > K⁺ > Cl⁻ > S2-
2) S2- > Cl⁻ > K⁺ > Ca²⁺ > Ga3+
3) Ga3+ > S2- > Ca²⁺ > Cl⁻ > K⁺
4) Ga3+ > Ca²⁺ > S2- > Cl⁻ > K⁺
5) Ga3+ > Ca²⁺ > S2- > K⁺ > Cl⁻