Match List I with List II:
| List I (Lac operon gene) | List II (Product) |
|---|---|
| A. Gene 'a' | I. β-galactosidase |
| B. Gene 'y' | II. Transacetylase |
| C. Gene 'i' | III. Permease |
| D. Gene 'z' | IV. Repressor protein |
a → transacetylase, y → permease, i → repressor, z → β-galactosidase.