In a reaction $2A_2 +B_2 \to 2A_2B_1$ the reactant A will disappear at

Question

$\begin{array}{1 1} \text{half the rate that B will decrease } \\ \text{the same rate that B will decrease } \\ \text{double the rate that $A_2B$ will form } \\ \text{twice the rate that B will decrease } \end{array} $