For the Following Reaction H₂ (g) + I₂ (g) $\rightarrow$ 2 HI (G), the Initial Rate of Formation of Hydrogen

For the following reaction H₂ (g) + I₂ (g) $\rightarrow$ 2 HI (g) , the initial rate of formation of hydrogen iodide was found to be 3.2 × 10^-3 mol dm^-3 s^-1. What is the initial rate of consumption of H₂?

A) 3.2 × 10^-3 mol dm^-3 s^-1.
B) 1.6 × 10^-3 mol dm^-3 s^-1.
C) 6.4 × 10^-3 mol dm^-3 s^-1.
D) Not possible to determine.