In the reaction, 2S₂O²⁻₃+I₂⟶S4O²⁻₆+2I⁻, the equivalent weight of Na₂S₂O₃ is equal to its.
A. 12× Molecular wt.
B. Molecular wt.
C. 2× Molecular wt.
D. 16× Molecular wt..