The reaction depicted involves the use of osmium tetroxide (OsO₄) followed by water (H₂O) in the reaction sequence. This is a classic example of syn-dihydroxylation, where a pair of hydroxyl (OH) groups are added to the same side (syn addition) of the double bond in an alkene.

Here's the step-by-step reasoning for the transformation:

1. The reactant molecule has a double bond, which acts as the site for the syn-dihydroxylation reaction.
2. In the presence of OsO₄, the double bond will coordinate with the osmium, forming a cyclic osmate ester intermediate.
3. Addition of water (H₂O) leads to hydrolysis of this intermediate, resulting in the syn addition of two hydroxyl groups across the former double bond.
4. The stereochemistry of the molecule is preserved in a syn addition, meaning both new hydroxyl groups are added to the same face of the double bond.

This transformation converts the alkene to a vicinal diol (glycol), where the OH groups are on adjacent carbon atoms.

Given this reaction mechanism, the correct product from the provided options is the one showing the syn-diol formation.

The correct answer is thus represented by the image above.