GKFix MCQ Question

What is the molar solubility of a salt with the formula AB₂ if its Ksp is 4S³?

• A. S = (Ksp/2)¹⁄²
• B. S = (Ksp/3)¹⁄³
• C. S = (Ksp/5)¹⁄⁵
• D. S = (Ksp/4)¹⁄³