In the Following Reaction, Which Molecule Is the Reductant? 1,3-Bisphosphoglycerate $\rightarrow$

Multiple Choice

In the following reaction, which molecule is the reductant? 1,3-bisphosphoglycerate + NADH + H⁺ $\rightarrow$ glyceraldehyde-3-phosphate + P_i + NAD⁺

A) 1,3-bisphosphoglycerate
B) NADH
C) H⁺
D) glyceraldehyde-3-phosphate
E) both NADH and glyceraldehyde-3-phosphate