Glucose reacts with bromine water to produce:

Gluconic acid

The correct answer is option 2. gluconic acid.

Glucose reacts with bromine water to produce gluconic acid. Bromine water is a mild oxidizing agent, and it oxidizes the aldehyde group in glucose to a carboxyl group. The reaction is as follows:

Glyceraldehyde, saccharic acid, and glutaric acid are not produced in this reaction.