To solve this problem, we need to match the genes of the Lac operon with their respective products. Let's analyze each gene:$\newline \bullet$a. i gene:$\newline$ - The i gene codes for the repressor protein, which binds to the operator region to inhibit transcription.$\newline$ - This matches with (i) Repressor.$\newline \bullet$b. z gene:$\newline$ - The z gene codes for β-galactosidase, an enzyme that breaks down lactose into glucose and galactose.$\newline$ - This matches with (ii) β-galactosidase.$\newline \bullet$c. a gene:$\newline$ - The a gene codes for transacetylase, an enzyme involved in the acetylation of lactose.$\newline$ - This matches with (iii) Transacetylase.$\newline \bullet$d. y gene:$\newline$ - The y gene codes for permease, a protein that facilitates the entry of lactose into the cell.$\newline$ - This matches with (iv) Permease.$\newline$Now, let's match the genes with their products:$\newline a \rightarrow i, b \rightarrow ii, c \rightarrow iii, d \rightarrow iv \newline$This corresponds to Option 1.