Which of the following provides a weak acid that dissociates in water according to the equation provided?
A) HCHO₂(aq), Ka = 2 × 10{-4)
B) H₂CO3(aq), Ka = 4.3 × 10{-7)
C) HNO3(aq), Ka = 24 × 10⁻¹
D) H₂SO₄(aq), Ka = 1.0 × 10{-3)