Considering $$LiBH_4$$ reduces an ester group to the corresponding alcohol and does not reduce a carboxylic acid group, the correct statement about the major products $$\mathbf{P}$$, $$\mathbf{Q}$$, $$\mathbf{R}$$ and $$\mathbf{S}$$ is

$$\mathbf{P}$$ & $$\mathbf{Q}$$ are identical, and $$\mathbf{R}$$ & $$\mathbf{S}$$ are diastereomers.

$$\mathbf{P}$$ & $$\mathbf{Q}$$ are diastereomers, and $$\mathbf{R}$$ & $$\mathbf{S}$$ are identical.

$$\mathbf{P}$$ & $$\mathbf{Q}$$ are diastereomers, and $$\mathbf{R}$$ & $$\mathbf{S}$$ are diastereomers.

$$\mathbf{P}$$ & $$\mathbf{Q}$$ are identical, and $$\mathbf{R}$$ & $$\mathbf{S}$$ are identical.