GKFix MCQ Question

What is the first ionization reaction of a dibasic acid H2X?

• A. H2X ⇌ 2H+ + X^2–
• B. H2X ⇌ H+ + X^2–
• C. H2X ⇌ H+ + HX–
• D. H2X ⇌ H2 + X