Balanced chemical equation in a base for CrO₄²⁻+S₂O₄²⁻→Cr(OH)₃+SO₃²⁻is:
a)CrO₄²⁻+3S₂O₄²⁻+8OH⁻→Cr(OH)₃+2SO₃²⁻
b)CrO₄²⁻+S₂O₄²⁻+2OH⁻→Cr(OH)₃+SO₃²⁻
c)CrO₄²⁻+2S₂O₄²⁻+4OH⁻→Cr(OH)₃+SO₃²⁻
d)CrO₄²⁻+2S₂O₄²⁻+8OH⁻→Cr(OH)₃+2SO₃²⁻