H₂SO₃(aq) HSO₃(aq) + H⁺(aq) K_c = 1

Multiple Choice

H₂SO₃(aq) HSO₃(aq) + H⁺(aq) K_c = 1.4 × 10^-2 H₂SO₃(aq) SO₃^2-(aq) + 2H⁺(aq) K_c = 9.1 × 10^-10
Given the above equilibrium constant data at 25°C, what is the value of K_c at this temperature for the reaction
HSO₃^-(aq) SO₃^2-(aq) + H⁺(aq) ?

A) 6.5 ×10^-8
B) 1.3 × 10^-11
C) 7.8 × 10¹⁰
D) 1.5 × 10⁷
E) None of these choices are correct.