Which one of the following enzymes

The conversion of CO2 and H2O into carbonic acid during the formation of aqueous humour is catalysed by which one of the following enzymes –

3.Carbonic anhydrase
4.Carbonic deoxygenase


Question is very simple. Whereever carbonic anhydrase system is present in the body, this reaction is catalysed by carbonic anhydrase, e.g. in eye, stomach, kidney.