Calculate the PH of a 0

Calculate the pH of a 0.200 M H₂A⁻ solution.K₁ = 1 × 10⁻⁴,K₂ = 1 × 10⁻⁸ and K₃ = 1 × 10⁻¹².

A) 4) 35
B) 6) 00
C) 8) 00
D) 8) 65
E) 10.00