JEE Main Chemistry question

A certain ion B⁻ has an Arrhenius constant for basic character (eq. constant 2.8×10⁻⁷). The equilibrium constant for Lowry-Bronsted basic character is:

• (A)2.8×10⁻⁷Correct
• (B)3.57×10⁻⁸
• (C)3.57×10⁸
• (D)2.8×10⁷