For the Chemical reaction.

${\mathrm{A}}_{2( \mathrm{g})}+{\mathrm{B}}_{2( \mathrm{g})}\rightleftharpoons 2{\mathrm{AB}}_{\left(\mathrm{g}\right)}\mathrm{t}$ the amount of AB at equilibrium is affected by

 ${\mathrm{A}}_{2( \mathrm{g})}+{\mathrm{B}}_{2( \mathrm{g})}\rightleftharpoons 2{\mathrm{AB}}_{\left(\mathrm{g}\right)}$

The pace of reaction normally rises as temperature does. The reactant molecules' average kinetic energy will rise as the temperature rises. Thus, for the reaction only the temperature will affect.

Therefore, the correct answer is option (B) Temperature only.