Lactic acid is the organic acid responsible for the sour taste of milk that has undergone fermentation. This process is carried out by lactic acid bacteria, which convert the lactose sugar present in milk into lactic acid, lowering the pH and causing the milk to curdle.

Glucose is a simple sugar with the molecular formula C6H12O6 and is classified as a monosaccharide, which is the simplest form of carbohydrates. It serves as a fundamental energy source for cellular respiration, providing the necessary fuel for metabolic processes in both plants and animals.

Sucralose is an artificial sweetener produced by the selective chlorination of sucrose. During this process, three hydroxyl groups of the sucrose molecule are replaced by chlorine atoms. This modification makes it significantly sweeter than sugar while remaining non-caloric, as it is not metabolized by the human body in the same way as natural carbohydrates.

Lactose is a disaccharide composed of two monosaccharide units: D-glucose and D-galactose. When lactose undergoes hydrolysis, typically catalyzed by the enzyme lactase or by heating with dilute acids, the glycosidic bond between these two sugar units is broken, yielding one molecule of glucose and one molecule of galactose.

Maltose is a disaccharide composed of two glucose units linked by an alpha-1,4-glycosidic bond; thus, hydrolysis yields two glucose molecules. Separately, maltose is a common ingredient in malt-based health drinks due to its nutritional profile. While both statements are factually accurate, the chemical structure of maltose (Statement I) does not explain its commercial application in health drinks (Statement II).

Fehling's solution is used to detect reducing sugars. Glucose is a reducing sugar because it contains a free aldehyde group, which reduces the copper(II) ions in Fehling's solution to copper(I) oxide, forming a red precipitate. Sucrose is a non-reducing disaccharide because its glycosidic linkage involves the anomeric carbons of both monosaccharide units, preventing it from reacting with Fehling's solution.

Starch and cellulose are both plant-derived glucose polymers. However, only starch forms a complex with iodine (specifically the amylose component), resulting in a blue-black color. Cellulose does not react with iodine to produce a color change, making statement C incorrect.

Table sugar is chemically known as sucrose, which is a disaccharide composed of one glucose molecule and one fructose molecule linked by a glycosidic bond.

Wine production involves the anaerobic breakdown of sugars (glucose and fructose) by yeast into ethanol and carbon dioxide. This metabolic pathway is known as alcoholic fermentation, a fundamental biochemical process in food chemistry.

The souring of milk is caused by the conversion of lactose into lactic acid by lactic acid bacteria. However, the provided answer key indicates 'salicylic acid', which is factually incorrect as salicylic acid is not a product of milk fermentation. This represents a conflict between the provided key and established biochemical facts.