The correct option is B NaOH
Carbon dioxide reacts with sodium hydroxide, an alkali, to give sodium bicarbonate or sodium hydrogen carbonate (NaHCO3) as shown below.
CO2(g) + NaOH(aq) → NaHCO3(aq)Carbon Sodium Sodiumdioxide hydroxide bicarbonate
NaHCO3 is commonly called baking soda and is used to manufacture baking powder.
Note: Alkalis are bases which are soluble in water.