Select the correct option for $\beta$-galactosidase.
- A$H_2O + \text{Lactose} \rightarrow \text{Glucose} + \text{Galactose}$
- B$H_2O + \text{Galactose} \rightarrow \text{Glucose} + \text{Lactose}$
- C$H_2O + \text{Lactose} \rightarrow \text{Galactose} + \text{Maltose}$
- D$H_2O + \text{Maltose} \rightarrow \text{Glucose} + \text{Glucose}$
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